Xantrex Technology XDC manual Load Wiring, Wire Size Maximum Current a

Installation

Load Wiring

Load Wiring

When connecting load wiring to the power supply, consider the following factors:

•Current carrying capacity of the wire

•Maximum load wiring length for operation with sense lines

•Noise and impedance effects of the load lines

Current As a minimum, load wiring must have a constant capacity greater than the output Carrying current rating of the power supply. This ensures that the wiring will not be damaged Capacity even if the load is shorted. Table 2.4. shows the maximum current rating, based on

450A per square centimeter, for various gauges of wire rated for 105°C operation. Operating at the maximum current rating results in a temperature rise of approximately 30°C for a wire operating in free air. Where load wiring must operate in areas with elevated ambient temperatures or bundled with other wiring, use larger gauges or higher temperature-rated wiring. For high current applications, custom-designed bus bars are typically used. To increase the current carrying capability, use parallel cables.

Table 2.4 Current Carrying Capacity for Load Wiring1

Wire Size	Maximum Current (A)	Wire Size	Maximum Current
(AWG)		(AWG)	(A)
20	2.5	4	97
18	4	2	155
16	6	1	192
14	10	1/0	247
12	16	2/0	303
10	21	3/0	350
8	36	4/0	405
6	61	250MCM	455

1.Single insulated conductors in free air, 30°C

48 Operating Manual for XDC Series Power Supply