Here's the problem with these units. The 6' whip from the generator to the connection box comes pre-wired. Inside the connection box the power wires are terminated and the control wires have Molex connectors on them. On the transfer switch end the 30' greenfield whip contains the wires that are to be connected to the outdoor connection box. On the far end of the whip the power wires are ring-spaded and the control wires have the matching Molex connectors. The 2' whip that connects the transfer switch to the breaker panel is metallic seal-tight. In your case the breakers included are (5) s/p 15's, (5) s/p 20's, (1) 2-p 20, (1) 2-p 40 and (1) 2-p 50. This is a pre-packaged, pre-engineered system and was submitted to UL as designed. I don't mean to de-rail this thread but these questions wers brought up in my contractors association meeting this past week :
- Can these whips be modified in any way without voiding the UL listing ?
- Can the breakers be changed to accommodate the actual circuits needed ?
- If my connection from the transfer switch to the generator is only 10' away am I supposed to coil the extra 20' in the ceiling rafters of the basement ?
Personally speaking, I have modified these whips numerous times and have not been cited for a violation (that's not to say that I'm right). I can't figure out why they use a 2' metallic seal-tight whip for an inside connection. It's a real PITA to work with and if you have to cut it down to accommodate your installation you have to remove the wires anyway. I've changed this to greenfield and again have not been cited. And finally I've changed the circuit breakers to accommodate my customers needs. In many cases I've had no need for a 2-p 20, 2-p 40 or a 2-p 50 breaker. If changing them and the wiring in the whip are violations what would be the right thing to do ? Leave them unused in the sub-panel and safe-off the wiring on the main breaker side ?