Installation Guide

Installation Planning
975-0639-01-01 Rev D 1–15
This guide for use by qualified personnel only
DC Disconnects
and Overcurrent
Devices
The DC circuit from the battery to the inverter/charger must be equipped with a
disconnect and overcurrent protection device. Refer to your applicable
installation code.
Typ eThis device usually consists of a circuit breaker, a “fused-disconnect,” or a
separate fuse (installed at each positive cable near the battery terminal) and DC
disconnect. Do not confuse AC circuit breakers with DC circuit breakers. They
are not interchangeable.
RatingThe rating of the fuse or breaker must be matched to the size of cables
used in accordance with the applicable installation codes.
LocationThe breaker or fuse and disconnect should be located as close as
possible to the battery in the positive cable.
Applicable codes may limit how far
the protection can be from the battery.
Conext SW DC
Switchgear
The DC Switchgear (part number: 865-1016) provides complete DC disconnect
and overcurrent protection for the Conext SW Inverter/Charger. The Conext DC
Switchgear contains a master DC breaker that stops DC power from the main DC
source. The DC Switchgear must be installed with the Conext SW Inverter/
Charger in Canada and USA.
Tabl e 1-2 Recommended Battery Cable Sizes
a
a.From National Electrical Code (NEC) requirements.
Conduit
b
b.Per NEC Table 310.16 for 177 °F (75 °C) rated copper conductor.
Model Maximum
Current (A)
Cable Length
< 5 ft
Cable Length
5 to 10 ft
SW 2524 120/240 120 1 AWG
SW 4024 120/240 200 3/0 AWG
SW 4048 120/240 120 1 AWG
IMPORTANT: Using a smaller gauge cable or a longer cable may cause the
inverter to shut down under heavy load.
WARNING
FIRE AND BURN HAZARD
Do not use battery cables that are insufficiently sized for expected current.
Check local electrical codes carefully.
Failure to follow this instruction can result in death or serious injury.
Tabl e 1-3 Recommended Fuse and Breaker Sizes
Model Fuse Size (A) Minimum Breaker Size (A)
SW 2524 120/240 250 250
SW 4024 120/240 250 250
SW 4048 120/240 250 250