Xantrex XPLORE 120/12, Owner'S Manual, Page: 30 / 68

Preparing For Installation
18 XPLORE 120/12 Battery Charger Owner's Guide
Over-current Protection Disconnect
Electrical codes require the DC circuit from each battery to the
charger to be equipped with a disconnect and an over-current
protection device, usually within 7 inches (17.8 cm) of each
battery. The devices are usually DC-rated circuit breakers, fused
disconnects, or a separate fuse and disconnect for each circuit.
These devices must be rated for DC voltage and 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.
AWG Max. Fuse/Breaker
3 150 A
4 150 A
6 60 A
Table 2 Fuse Sizes versus Wire
Sizes
AC Wiring
DANGER
FIRE HAZARD
Use only on circuits provided with 20A maximum branch circuit
protection in accordance with National Electrical Code, NFPA 70
and Canadian Electrical Code (CSA C22.1).
EXTERNAL CONNECTIONS TO CHARGER SHALL COMPLY
WITH THE UNITED STATES COAST GUARD ELECTRICAL
REGULATIONS ( 33CFR183 SUB PART I).
Failure to follow these instructions will result in death or serious
injury.
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 XPLORE Charger should be three-
conductor cable, providing a ground , line, and neutral conductors
(or G, L, N) in an outer jacket, rated a minimum of 75 °C, and sized
based on the AC input current to the charger (see
AC Input
Specifications on page 53 ) and on the value of overcurrent
protection provided.