That code is for low voltage-- something on that circuit is shorted to ground.
You will have to check a wire diagram-- for what that services --and it should help you trace the short.
Here is a trick that will help find it-- get a 10 amp circuit breaker (do not use anything higher than the 10 amp breaker-would burn stuff up) - use jumpers to add that to the system instead of the fuse. Now when it is shorted, the circuit breaker will click off and on. Use a el-cheap compass, now follow the wire with the compass. When there is power in the wire, the North needle will point to the wire. When breaker clicks off, it will point away from the wire. It will lead you right to the short. If the short is in the middle of the wire, it will point to the wire as you follow along, but if you pass it, it will not. Constant shorts are easier to find than ones that only shorts once in a while.
(With a short, it will build a magnet field around the wire. Electro-magnet)
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Last edited by jc1843; 03-03-2011 at 04:32 PM.