14 Truecharge2 Series Battery Charger Owner’s Guide

Preparing For Installation
current and be rated to withstand the short circuit current available from the
connected battery bank. Do not substitute devices rated only for AC
voltage; they may not operate properly.
The current rating of the DC fuses must be correctly matched to the size of
the DC wiring used, in accordance with the applicable codes. This helps to
protect the installation against fire in case of any overcurrent or short circuit
fault.

DC Chassis Ground

The DC chassis ground (earth) wire should also be sized correctly to
provide proper protection. Refer to the local electrical codes for your
specific installation to determine the correct gauge. The ABYC standards
require this DC chassis ground wire to be the same size as the largest DC +
and – conductors connected to the charger, or no more than one wire size
smaller. See “Step 2: Connecting the DC Chassis Ground (Earth)” on page
17 for instructions.
AC Wiring
The AC wiring must be of sufficient size, and it must be protected by the
appropriate size and type of input breaker, based on the jurisdiction and
application. Some basic examples are given below.
The AC input wiring for the Truecharge2 Battery Charger should be three-
conductor cable, providing a line, neutral, and ground conductor (or L, N,
GND) in an outer jacket, rated a minimum of 75C, and sized based on the
AC input current to the charger (see “AC Input Specifications” on page 54)
and on the value of overcurrent protection provided.
For example:
• in US NEC, you may use a 14AWG wire with a 15 A breaker for up to
12A continuous current (or 12 AWG for a 20 A breaker for up to 16 A
continuous current) or
• for 230Vac application, you may be able to use either a 2.5mm2 wire
with a 16A breaker or use 1.5 mm2 wire with a 10 A breaker.
Table 3
Fuse Sizes versus Wire Sizes Based on ABYC Regulations

AWG Max. Fuse/Breaker

14 15A
12 20A
10 30A
850A
680A
4 100A
2 125A
1 150A

FIRE HAZARD

Use only on circuits provided with 20A maximum branch circuit
protection in accordance with National Electrical Code, NFPA 70.
Failure to follow these instructions will result in death or serious
injury.
TC2 204060 Series BattChg Owners Guide.book Page 14 Friday, July 8, 2011 11:44 AM