R
I am aware of and have read the pertinent sections of NFPA 79 regarding taps (8.4)and main disconnect mounting (7.8.1). My question is, How does one take a tap from the line side of a 400 amp CB main panel disconnect to supply a 1 KVA lighting disconnect/transformer? You can't just jamb a number 10 in with the 600 MCM feeders. You can't put a distribution block above the main breaker and tap off there. The lug supplied with the breaker sure doesn't have an opening for 600 MCM and one for #10. I know this is being done all over the place. How are you doing this?
Also, if the light box tap conductors terminate at a little 16 amp rotary disconnect switch inside the lighting disconnect, does that mean I cannot use exception #2 of 8.4 since it lists only "a splitter block, circuit breaker or a set of fuses" but not a rotary disconnect. If so, then how do I get the #2 AWG required to meet the 1/3 rule down to a manageable size?
Hmmmm?
Also, if the light box tap conductors terminate at a little 16 amp rotary disconnect switch inside the lighting disconnect, does that mean I cannot use exception #2 of 8.4 since it lists only "a splitter block, circuit breaker or a set of fuses" but not a rotary disconnect. If so, then how do I get the #2 AWG required to meet the 1/3 rule down to a manageable size?
Hmmmm?