i have installed a split board one 80 amp and a 63 amp
the board has been tested and was workinf fine untill i put in a ne light but i also took the existing lights feed and loop it from this new light now the 63 amp breaker keeps tripping why is that

cass, September 2009

More than 63A is flowing...

However much current is being drawn, the fault happened when you installed the new light - it follows then that you have probably wired the new light incorrectly.

For your own safety it may be best to call in an electrician - my guess is that you've connected the Switched Live (Hot) from the light switch to Neutral instead of to the lamp - not an unusual wiring fault.

63Amps is an awful lot for a lighting circuit even in 115V land - enough for over 7kW of lighting!

Y'all take care now...

Peccavi, September 2009