EX8200 Power System

AC Power Supply in an EX8200 Switch

EX8200 switches can use either AC or DC power supplies. This topic describes the AC power supplies in EX8200 switches.

AC Power Supply Description

The AC power supplies in EX8200 switches are hot-insertable and hot-removable field-replaceable units (FRUs).

You can install up to six AC power supplies in an EX8200 switch. Power supplies are installed at the bottom of the chassis in slots PSU 0 through PSU 5 (left to right). All power supplies are accessible from the front of the chassis.

Warning

The switch is installed in a restricted-access location. It has a separate protective earthing terminal on the chassis that must be permanently connected to earth ground to adequately ground the chassis and protect the operator from electrical hazards.

Caution

Before switch installation begins, ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.

Note

All base configuration EX8200 switches are shipped with two power supplies. Cover panels are installed over the remaining four power supply slots. Additional power supplies can be added to base configuration switches as necessary.

For details about different switch configurations, see EX8208 Switch Configurations or EX8216 Switch Configurations.

Each AC power supply weighs approximately 7 lb (3.2 kg) and has an independent 16 A rated AC inlet on the faceplate. Each inlet requires a dedicated AC power feed. Each AC power supply has a switch labeled ENABLE, a fan, and three LEDs on the faceplate that indicate the status of the power supply. See Figure 1.

Each AC power supply comes with a power cord retainer that holds the power cord in place. See Figure 2. The power cord retainer has a clip and an adjustment nut. The L-shaped ends of the clip hook into the bracket holes on each side of the AC appliance inlet on the faceplate. The adjustment nut holds the power cord in the correct position. For instructions for installing the power cord retainer, see Connecting AC Power to an EX8200 Switch.

Power Cord Retainer
for an AC Power Supply

Each power supply connects to the backplane in an EX8208 switch and to the midplane in an EX8216 switch. The backplane and the midplane distribute the output power produced by the power supplies to different switch components. Each AC power supply provides power to all the components in the switch.

Each power supply has its own fan and is cooled by its own internal cooling system. The airflow is from the front of the power supply to the back. Hot air exhausts from the rear of the chassis.

EX8200 switches support both 2000 W AC power supplies and 3000 W AC power supplies.

The 2000 W AC power supply supports both the low-voltage line (100–120 VAC) and the high-voltage line (200–240 VAC) AC power configurations. In both cases, the output is 52 VDC. The output power is 1200 W for low-voltage line input and 2000 W for high-voltage line input.

The 3000 W AC power supply supports only the high-voltage line input (200–240 VAC) AC power configuration. Low-voltage line input is not supported for the 3000 W AC power supplies on the EX8200 switches. The output is 52 VDC. The output power is 3000 W.

N+1 Redundancy Configuration of AC Power Supplies

N+1 redundancy configuration is required for normal operation of EX8200 switches. In an N+1 redundancy configuration, if one power supply fails or is removed, the remaining power supplies continue to supply power for the switch without interruption.

Depending on the configuration type of the switch and the input voltage, determine the number of power supplies needed (N) for a switch. Install an additional power supply to meet the required N+1 redundancy configuration. For details about different switch configurations, see EX8208 Switch Configurations or EX8216 Switch Configurations.

The tables in this section list the N+1 power requirements for different EX8200 switch configurations:

Table 1—Lists the N+1 power requirements of EX8208 switch configurations that use 2000 W AC power supplies.
Table 2—Lists the N+1 power requirements of EX8208 switch configurations that use 3000 W AC power supplies.
Table 3—Lists the N+1 power requirements of EX8216 switch configurations that use 2000 W AC power supplies.
Table 4—Lists the N+1 power requirements of EX8216 switch configurations that use 3000 W AC power supplies.

Table 1: N+1 Power Redundancy Configurations for Different EX8208 Switch Configurations Using 2000 W AC Power Supplies

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+1 Redundancy
Base	High-voltage line (200–240 VAC)	1	2
Base	Low-voltage line (100–120 VAC)	2	3
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	3	4
Fully loaded with 8-port SFP+ line cards	Low-voltage line (100–120 VAC)	5	6

Table 2: N+1 Power Redundancy Configurations for Different EX8208 Switch Configurations Using 3000 W AC Power Supplies

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+1 Redundancy
Base	High-voltage line (200–240 VAC)	1	2
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	2	3

Table 3: N+1 Power Redundancy Configurations for Different EX8216 Switch Configurations Using 2000 W AC Power Supplies

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+1 Redundancy
Base	High-voltage line (200–240 VAC)	2	3
Base	Low-voltage line (100–120 VAC)	2	3
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	5	6
Fully loaded with 8-port SFP+ line cards	Low-voltage line (100–120 VAC)	Not supported	Not supported

Table 4: N+1 Power Redundancy Configurations for Different EX8216 Switch Configurations Using 3000 W AC Power Supplies

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+1 Redundancy
Base	High-voltage line (200–240 VAC)	1	2
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	4	5

N+N Redundancy Configuration of AC Power Supplies

You can optionally configure your switch for N+N redundancy, in which N power supplies can be removed or can fail and the remaining N power supplies continue to supply power to the switch without interruption. A common application for N+N redundancy is to have a dual power feed for AC power supplies.

How many power supplies you require for N+N redundancy depends on which Junos OS release your switch is running:

Junos OS Release 10.1 or earlier—Use Table 1, Table 2, Table 3, or Table 4 to determine the number of power supplies needed (N). Then multiply the value of N by two.
Note
In Junos OS Release 10.1 or earlier, the power management feature manages switches for N +1 redundancy only. This means, for example, that power management raises an alarm if there is insufficient power to maintain N +1 redundancy, but not if there is insufficient power to maintain N+N redundancy.
Junos OS Release 10.2 or later—Use Table 5, Table 6, Table 7, or Table 8 in this section.

Starting with Junos OS Release 10.2, you can configure the power management software to manage the switch power for N+N redundancy. When you configure power management for N+N redundancy, power management lowers the maximum chassis power consumption by lowering the maximum fan speed. It does so to compensate for the extra power that is held in reserve in an N+N configuration than in an N+1 configuration, because of which less power would ordinarily be available to power line cards. By reducing the maximum chassis power consumption, power management allows the switch to power more line cards.

The configuration type of the switch and the input voltage determine the number of power supplies needed (N) for the switch. You must then install additional power supplies to meet the N+N redundancy configuration. For details about different switch configurations, see EX8208 Switch Configurations or EX8216 Switch Configurations.

The tables in this section list the N+N power requirements for different EX8200 switch configurations:

Table 5—Lists the N+N power requirements of EX8208 switch configurations that use 2000 W AC power supplies.
Table 6—Lists the N+N power requirements of EX8208 switch configurations that use 3000 W AC power supplies.
Table 7—Lists the N+N power requirements of EX8216 switch configurations that use 2000 W AC power supplies.
Table 8—Lists the N+N power requirements of EX8216 switch configurations that use 3000 W AC power supplies.

Table 5: N+N Power Supply Requirements for EX8208 Switch Configurations Using 2000 W AC Power Supplies (Junos OS Release 10.2 or Later Only)

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+`N` Redundancy
Base	High-voltage line (200–240 VAC)	1	2
Base	Low-voltage line (100–120 VAC)	1	2
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	3	6
Fully loaded with 8-port SFP+ line cards	Low-voltage line (100–120 VAC)	4	Not Supported

Table 6: N+N Power Supply Requirements for EX8208 Switch Configurations Using 3000 W AC Power Supplies (Junos OS Release 10.2 or Later Only)

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+`N` Redundancy
Base	High-voltage line (200–240 VAC)	1	2
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	2	4

Table 7: N+N Power Supply Requirements for EX8216 Switch Configurations Using 2000 W AC Power Supplies (Junos OS Release 10.2 or Later Only)

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+`N` Redundancy
Base	High-voltage line (200–240 VAC)	1	2
Base	Low-voltage line (100–120 VAC)	2	4
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	5	Not supported
Fully loaded with 8-port SFP+ line cards	Low-voltage line (100–120 VAC)	Not supported	Not supported

Table 8: N+N Power Supply Requirements for EX8216 Switch Configurations Using 3000 W AC Power Supplies (Junos OS Release 10.2 or Later Only)

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+`N` Redundancy
Base	High-voltage line (200–240 VAC)	1	2
Fully loaded with 8-port SFP+ line cards	High-voltage line (200–240 VAC)	3	6

AC Power Supply LEDs in an EX8200 Switch

An AC power supply has three LEDs on its faceplate. These LEDs display information about the status of the power supply. See Figure 3.

AC Power Supply LEDs
on an EX8200 Switch

Table 9 describes the LEDs on an AC power supply in an EX8200 switch.

Table 9: Power Supply LEDs on EX8200 Switches

LED	State	Description
INPUT OK	Unlit	Indicates one of the following: Power supply is disconnected from AC power feed. AC power input voltage is not within normal operating range. No AC power input.
	Green	AC power input is high-voltage line (200–240 VAC).
	Yellow Note: This LED state applies only to 2000 W AC power supplies.	AC power input is low-voltage line (100–120 VAC).
OUTPUT OK	Unlit	Indicates one of the following: DC output voltage is not within normal operating range. Power supply is not supplying DC power correctly.
	Green	DC power output is within normal operating range.
	Yellow	Power supply has been disabled internally by the system.
FAIL	Unlit	Power supply is functioning normally.
FAIL	Yellow	On steadily—Power supply has failed. Blinking—Demand for output power exceeds the supply.

Note

If the INPUT OK LED and the OUTPUT OK LED are unlit, the AC power cord is not installed properly or the power supply has failed.

If the INPUT OK LED is lit and the OUTPUT OK LED is unlit, the AC power supply is not installed properly or the power supply has an internal failure.

If the FAIL LED is lit, the power supply has failed and must be replaced. If the FAIL LED is blinking, add a power supply to balance the power demand and supply.

AC Power Specifications for EX8200 Switches

EX8200 switches can use either AC or DC power supplies.

Table 10 lists the AC power specifications for a 2000 W power supply used in EX8200 switches.

Table 10: Power Specifications for a 2000 W AC Power Supply in an EX8200 Switch

Item	Specifications
AC input voltage	Operating range: Low-voltage line—100–120 VAC High-voltage line—200–240 VAC
AC input line frequency	50–60 Hz
AC input current rating	Low-voltage line—13.8 A High-voltage line—12 A
AC output power	Low-voltage line—1200 W High-voltage line—2000 W

Table 11 lists the AC power specifications for a 3000 W power supply used in EX8200 switches.

Table 11: Power Specifications for a 3000 W AC Power Supply in an EX8200 Switch

Item	Specifications
AC input voltage	Operating range: High-voltage line—200–240 VAC Note: Low-voltage line input is not supported for 3000 W AC power supplies on the EX8216 switch.
AC input line frequency	50–60 Hz
AC input current rating	High-voltage line—16 A
AC output power	High-voltage line—3000 W

AC Power Cord Specifications for an EX8200 Switch

Each AC power supply has a single AC appliance inlet that requires a dedicated AC power feed. Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the switch. An AC power cord connects each power supply to the power distribution panel.

Each detachable AC power cord is 8 feet (approximately 2.5 meters) long. The appliance coupler end of the cord inserts into the AC appliance inlet on the faceplate of the AC power supply. The coupler type is C19 as described by the International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source outlet that is standard for your geographical location.

Note

In North America, AC power cords must not exceed 15 feet (approximately 4.5 meters) in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52 and Canadian Electrical Code (CEC) Section 4-010(3). The cords shipped with the switch to North America and Canada are in compliance.

Table 12 lists the AC power cord specifications for an EX8200 switch for various countries and regions.

Table 12: AC Power Cord Specifications for an EX8200 Switch

Country/Region	Electrical Specifications	Plug Standards	Juniper Model Number	Graphic
Argentina	250 VAC, 16 A, 50 Hz	IRAM Type RA/3/20	CBL-EX-PWR-C19-AR	No graphic available.
Australia	250 VAC, 15 A, 50 Hz	AS/NZS 3112 Type SAA/3/15	CBL-EX-PWR-C19-AU
Brazil	250 VAC, 16 A, 50 Hz	NBR 14136: 2002 Type BR/3/20	CBL-EX-PWR-C19-BR	No graphic available.
China	250 VAC, 16 A, 50 Hz	GB 1002 Type PRC/3/16	CBL-EX-PWR-C19-CH
Europe (except Italy, Switzerland, and United Kingdom)	250 VAC, 16 A, 50 Hz	CEE (7) VII Type VIIG	CBL-EX-PWR-C19-EU
India	250 VAC, 16 A, 50 Hz	SABS 164/1:1992 Type ZA/3	CBL-EX-PWR-C19-IN	No graphic available.
Israel	250 VAC, 16 A, 50 Hz	SI 32/1971 Type IL/3	CBL-EX-PWR-C19-IL
Italy	250 VAC, 16 A, 50 Hz	CEI 23-16 Type I/3/16	CBL-EX-PWR-C19-IT
Japan	250 VAC, 16 A, 50 Hz or 60 Hz	NEMA 6–20 Type N6/20	CBL-EX-PWR-C19-JP
Japan	250 VAC, 16 A, 50 Hz or 60 Hzv	NEMA L6–20P Type NEMA Locking	CBL-EX-PWR-C19-JPL (default)
Korea	250 VAC, 16 A, 50 Hz	CEE (7) VII Type VIIG	CBL-EX-PWR-C19-KR
North America	250 VAC, 16 A, 60 Hz	NEMA 6–20 Type N6/20	CBL-EX-PWR-C19-US
	250 VAC, 16 A, 60 Hz	NEMA L6–20P Type NEMA Locking	CBL-EX-PWR-C19-USL (default)
	125 VAC, 15 A, 60 Hz	NEMA 5–15 Type N5/15 Note: Only for use with 2000 W AC power supply.	CBL-EX-PWR-C19-US-15	No graphic available.
	125 VAC, 20 A, 60 Hz	NEMA 5–20 Type N5-20 Note: Only for use with 2000 W AC power supply.	CBL-EX-PWR-C19-US-20
South Africa	250 VAC, 16 A, 50 Hz	SABS 164/1:1992 Type ZA/3	CBL-EX-PWR-C19-SA
Switzerland	250 VAC, 16 A, 50 Hz	SEV 5934/2 Type 23G	CBL-EX-PWR-C19-SZ	No graphic available.
Taiwan	250 VAC, 16 A, 50 Hz	NEMA L6-20P Type NEMA LOCKING	CBL-EX-PWR-C19-TW
United Kingdom	250 VAC, 13 A, 50 Hz	BS 1363/A Type BS89/13	CBL-EX-PWR-C19-UK

Caution

AC power cords for EX8200 switches are intended for use with these switches only. Do not use the cord for another product.

Power Cable Warning (Japanese)
Warning: The attached power cable is only for this product. Do not use the cable for another product.

Caution

Power cords must not block access to switch components. We recommend that you route all AC power cord cables through the power cord tray provided with the switch.

Warning

DC Power Supply in an EX8200 Switch

The DC power supplies in EX8200 switches are hot-removable and hot-insertable field-replaceable units (FRUs).

Note

EX8208 switches support 2000 W DC power supplies.

EX8216 switches support 3000 W DC power supplies.

You can install up to six DC power supplies in an EX8200 switch. Power supplies are installed at the bottom of the chassis in slots labeled PSU 0 through PSU 5 (left to right). See Slot Numbering for an EX8208 Switch and Slot Numbering for an EX8216 Switch. All power supplies are accessible from the front of the chassis.

Warning

The switch is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal provided on the chassis. This separate protective earthing terminal must be permanently connected to earth ground.

Note

EX8216 switches have two protective earthing terminals provided on the chassis, one on the left side of the chassis and the other on the rear of the chassis. Only one of these protective earthing terminals needs to be permanently connected to earth ground. See Chassis Physical Specifications of an EX8216 Switch for the location of the protective earthing terminals.

Note

DC power supplies are shipped only in the redundant configuration of EX8200 switches.

See EX8208 Switch Configurations for details about different EX8208 switch configurations.

See EX8216 Switch Configurations for details about different EX8216 switch configurations.

Each DC power supply weighs approximately 7 lb (3.2 kg) and has two independent pairs of DC input lugs (A: –48V A: RTN and B: – 48V B: RTN ) on the front of the power supply. Each power supply also has an Enable switch, a fan, and four LEDs on the faceplate that indicate the status of the power supply. See Figure 4.

Note

A 2000 W DC power supply requires a dedicated 60 A circuit breaker for each input DC feed.

A 3000 W DC power supply requires a dedicated 100 A circuit breaker for each input DC feed.

Each DC power supply connects to the backplane in an EX8208 switch and to the midplane in an EX8216 switch. The backplane in an EX8208 switch and the midplane in an EX8216 switch distribute the output power produced by the power supplies to different switch components. Each DC power supply provides power to all the components in the switch.

The output of each 2000 W DC power supply is 52 VDC. The output power is 2000 W.

The output of each 3000 W DC power supply is 52 VDC. The output power is 3000 W.

A DC power supply works with only one input DC feed connected. It is able to deliver the full output power to all chassis components with only one DC feed connected.

Each DC power supply has its own fan and is cooled by its own internal cooling system. The airflow is from the front of the power supply to the back. Hot air exhausts from the rear of the chassis.

The minimum power configuration required by an EX8200 switch is an N+1 power configuration. In an N+1 power configuration, if one power supply fails or is removed, the remaining power supplies continue to supply power for the system without interruption.

The configuration type of the switch and the input voltage determine the number of power supplies needed (N) for a switch. You must install an additional power supply to meet the required N+1 power redundancy configuration. The DC power supplies each provide independent A and B power feeds, so that dual power feed redundancy is available even in an N+1 configuration. See EX8208 Switch Configurations for details about different EX8208 switch configurations. See EX8216 Switch Configurations for details about different EX8216 switch configurations.

The tables in this section list the N+1 power requirements of different EX8200 switch configurations:

Table 13—Lists the N+1 power requirements of EX8208 switch configurations that use 2000 W DC power supplies.
Table 14—Lists the N+1 power requirements of EX8216 switch configurations that use 3000 W DC power supplies.

Table 13: N+1 Power Redundancy Configurations for Different EX8208 Switch Configurations Using 2000 W DC Power Supplies

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+1
Base	–40 VDC through –72 VDC	1	2
Fully loaded with 8-port SFP+ line cards	–40 VDC through –72 VDC	3	4

Table 14: N+1 Power Redundancy Configurations for Different EX8216 Switch Configurations Using 3000 W DC Power Supplies

Switch Configuration	Input Voltage	Power Supplies Needed (`N`)	Power Supplies Needed for `N`+1
Base	–40 VDC through –72 VDC	1	2
Fully loaded with 8-port SFP+ line cards	–40 VDC through –72 VDC	4	5

DC Power Supply LEDs in an EX8200 Switch

A DC power supply has four LEDs on its faceplate: FAIL, OUT OK, A IN OK, and B IN OK LEDs. The text A or B next to the OK IN LEDs indicates which input lug the LED corresponds to. All four LEDs display information about the status of the power supply. See Figure 5.

Note

EX8208 switches support 2000 W DC power supplies.

EX8216 switches support 3000 W DC power supplies.

DC Power Supply LEDs in an
EX8200 Switch

Table 15 describes the LEDs on a DC power supply in EX8200 switches.

Table 15: DC Power Supply LEDs in EX8200 Switches

LED	State	Description
A IN OK	Unlit	Indicates one of the following: Power supply is disconnected from DC power feed. DC power input voltage is not within normal operating range (-40 VDC through -72 VDC). No DC power input.
	Green	DC power input voltage is within normal operating range (–40 VDC through –72 VDC).
	Yellow	DC input is present on the terminals but either the fuse is tripped or the ORing diode is open.
	Red	DC power input voltage is reversed in polarity. Note: The DC power supply is protected against reverse polarity input for both DC input feeds.
B IN OK	Unlit	Indicates one of the following: Power supply is disconnected from DC power feed. DC power input voltage is not within normal operating range (-40 VDC through -72 VDC). No DC power input.
	Green	DC power input voltage is within the normal operating range (–40 VDC through –72 VDC).
	Yellow	DC input is present on the terminals but either the fuse is tripped or the ORing diode is open.
	Red	DC power input voltage is reversed in polarity. Note: The DC power supply is protected against reverse polarity input for both DC input feeds.
OUT OK	Unlit	Indicates one of the following: DC output voltage is not within normal operating range. Power supply is not supplying DC power correctly.
	Green	DC power output is within normal operating range.
	Yellow	Power supply has been disabled internally by the system.
FAIL	Unlit	Power supply is functioning normally.
FAIL	Yellow	On steadily—Power supply has failed. Blinking—Demand for output power exceeds the supply.

Note

If the IN OK LED and the OUT OK LED are unlit, the power cords are not installed properly or the power supply has failed.

If the IN OK LED is lit green and the OUT OK LED is unlit, the power supply is not installed properly or the power supply has an internal failure.

If the FAIL LED is lit, the power supply has failed and must be replaced. If the FAIL LED is blinking, add a power supply to balance the power demand and supply.

DC Power Specifications for EX8200 Switches

Table 16 lists the power specifications for the 3000 W DC power supply used in EX8216 switches.

Table 16: Power Specifications for a 3000 W DC Power Supply Used in an EX8216 Switch

Item	Specifications
DC input voltage	Minimum operating voltage: –40 VDC Nominal operating voltage: –48 VDC Operating voltage range: –40 VDC through –72 VDC Note: If the input voltage from the DC power source drops below –37.5 VDC through –39.5 VDC, the switching platform automatically shuts down. During automatic shutdown, the circuit remains active. When the input voltage returns to –43 VDC through –44 VDC, the switch automatically starts up again and the system returns to normal operation within 30 minutes. No operator intervention is required.
DC input current rating	75 A maximum at nominal operating voltage (–48 VDC) for each input terminal.
Output power	3000 W
Internal Fuse Protection	100 A

Table 17 lists the power specifications for the 2000 W DC power supply used in EX8208 switches.

Table 17: Power Specifications for a 2000 W DC Power Supply Used in an EX8208 Switch

Item	Specifications
DC input voltage	Minimum operating voltage: –40 VDC Nominal operating voltage: –48 VDC Operating voltage range: –40 VDC through –72 VDC Note: If the input voltage from the DC power source drops below –37.5 VDC through –39.5 VDC, the switching platform automatically shuts down. During automatic shutdown, the circuit remains active. When the input voltage returns to –43 VDC through –44 VDC, the switch automatically starts up again and the system returns to normal operation within 30 minutes. No operator intervention is required.
DC input current rating	50 A maximum at nominal operating voltage (–48 VDC) for each input terminal.
Output power	2000 W
Internal Fuse Protection	100 A

Grounding Cable and Lug Specifications for EX8200 Switches

To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect an EX Series switch to earth ground before you connect power to the switch. You must use the protective earthing terminal on the switch chassis to connect the switch to earth ground.

Warning

Caution

Grounding requirements for EX8200 switches:

EX8208 switches—A pair of threaded inserts (PEM nuts) is provided on the right side toward the top rear corner of the EX8208 chassis for connecting the switch to earth ground. The grounding points fit UNC ¼-20 screws. The grounding points are spaced at 0.625 in. (15.86 mm).
The grounding cable that you provide for an EX8208 switch must be 2 AWG (33.6 mm²), minimum 60°C wire, or as permitted by the local code.
Figure 6 shows the grounding lug that attaches to the grounding cable in an EX8208 switch.
Figure 6: Grounding Lug for an EX8208 Switch
EX8216 switches—Two pairs of threaded inserts (PEM nuts) are provided on the EX8216 chassis for connecting the switch to earth ground. The first pair is located on the right side toward the top rear corner of the chassis. The second pair is on the rear of chassis toward the bottom right corner of the chassis. Both pairs of grounding points fit UNC ¼-20 screws. The grounding points are spaced at 0.625 in. (15.86 mm).
The grounding cable that you provide for an EX8216 switch must be 2 AWG (33.6 mm²), minimum 60°C wire, or as permitted by the local code.
Note
EX8216 switches have two protective earthing terminals provided on the chassis. Only one of these protective earthing terminals needs to be permanently connected to earth ground. See Chassis Physical Specifications of an EX8216 Switch for the location of the protective earthing terminals.
Two grounding lugs are shipped with the EX8216 switch.

ON THIS PAGE

EX8200 Power System

AC Power Supply in an EX8200 Switch

AC Power Supply Description

N+1 Redundancy Configuration of AC Power Supplies

N+N Redundancy Configuration of AC Power Supplies

AC Power Supply LEDs in an EX8200 Switch

AC Power Specifications for EX8200 Switches

AC Power Cord Specifications for an EX8200 Switch

DC Power Supply in an EX8200 Switch

DC Power Supply LEDs in an EX8200 Switch

DC Power Specifications for EX8200 Switches

Grounding Cable and Lug Specifications for EX8200 Switches