Article 408.36 (d) / 705.12 (d) (6)

[Loffgren]

Working with a Wind-Driven Genorator Supply, (Windmill), for an agriculture area.

My first question is: What is an additional fastener ? See below pls.

Currently there is a 200amp service and sub-panel with plug in style breaker panel equipment, we are upgrading to 400amp service and sub, would'nt it make sense to use bolt-in equipment vs plug-in. I assume that would solve the below problem also when tying back into grid side.


Back-Fed devices. Plug-in-type overcurrent protection devices or plug-in type main lug assemblies that are backfed and used to terminate field-installed ungrounded supply conductors shall be secured in place by an additional fastner that requires other than pull to release the device from mounting means on the panel.


Second question/part is: Customer has two PG&E power sources on his property. The first being single phase 120/220 residential, the second is three phase 120/240 commercial.

He wants a transfer switch at the Wind-Driven Generator so that he can supply power to his Ag. property in the summer and his home in the winter. Problem being one is three phase and the other is single phase. Wind-Driven Generator is three-phase.

The Wind-Driven Generator does not use inverters in sync's with utility.

Anyone familiar with three-phase to single phase converters for wind-driven gerators?

 

[Smart $]

Regarding additional fastener, it is simply a means to better secure the breaker so that it cannot simply be unplugged. The means varies in design by manufacturer and panelboard/breaker type. No need to concern yourself with this requirement if you use a bolt-in breaker panelboard.

I don't know of any 3? to split 1? converters... not really my area.

Your mention of service configurations is not by conventional standards. Typically the residential service would be 120/240V 1? 3W while the other would be 240/120 3? 4W... a center-tap grounded delta configuration with high "B" leg, ≈208V to G. Track the drop/laterals back to the transformers if possible. There's a chance both services are fed by the same bank of three... meaning they are in sync with each other, just not with your generator. As such, if you grid tie a sync'd inverter to the three phase service, you are in effect already connecting it to the residential service, and the third line's power would simply go onto the grid if not used locally on the 3? system. Just a thought

PS: compare service rates. If the residential is lower, it may be best grid tie as suggested above rather than switch your alternate source between services.