T640 DC Power Cable Specifications
The accessory box shipped with the T640 router includes the cable lugs that attach to the terminal studs of each power supply (see Figure 1). (The cable lug shown in Figure 1 is also used for the grounding the chassis.)
Figure 1: T640 DC Power and Grounding Cable Lug
 | Caution: Before router installation begins, a licensed electrician must attach a cable lug to the power cables that you supply. A cable with an incorrectly attached lug can damage the router. |
Table 1: T640 Power Cable Specifications
Cable Type | Quantity and Specification | Connector Specification |
|---|---|---|
Power | Eight 4-AWG (21.2 mm2 ) (minimum) copper conductor, or as required by the local code. | Cable lug; dual hole, sized to fit 1/4-20 UNC terminal studs at 15.86-mm (0.625-in.) center line. |
 | Warning: For field-wiring connections, use copper conductors only. For other electrical safety information, see General Electrical Safety Guidelines and Electrical Codes for M Series, MX Series, and T Series Routers. |
| Caution: You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply. |
| Caution: Power cables must not block access to router components or drape where people could trip on them. |
