Product Manual (GP-ISW-400)

gpelectric.com | [page 19]
INSTALLATION
3.3.1 DC WIRING SIZING
The distance between the battery bank and the GP-ISW should be as short as possible to achieve
maximum e󰀩ciency and to reduce re hazards. The size of the cable should be thick enough
to limit the voltage drop to less than 2% when carrying the maximum input current to prevent
frequent low-input voltage warnings and shutdown. Only use high quality copper wire.
For greater e󰀩ciency, the cables should be as short as possible. The combined cable length should
be no more than 10ft (3m). Keeping your wire runs as short as possible helps to prevent: low
voltage shutdowns and nuisance tripping of the DC breaker because of increased current draw.
The table below shows the recommended DC cable size, fuses/circuit breakers and DC grounding
cable sizes for the GP-ISW (Note: these values are correct for cables in free air, not conduit)
Model Wire AWG Inline Fuse / Circuit Breaker
GP-ISW200-12 #6 F-110A
GP-ISW200-24 #6 F-110A
GP-ISW400-12 #6 F-110A
GP-ISW400-24 #6 F-110A
GP-ISW700-12 #6 F-110A
GP-ISW700-24 #10 F-110A
GP-ISW1000-12 #4 F-110A
GP-ISW1000-24 #8 F-110A
GP-ISW1500-12 #2 F-200A
GP-ISW1500-24 #6 F-200A
GP-ISW2000-12 #2/0 F-300A
GP-ISW2000-24 #4 F-200A
GP-ISW3000-12 #4/0 F-400A
GP-ISW3000-24 #2 F-300A
GP-ISW4000-24 #2/0 F-400A