On Dec 2, 2010, at 12:08 PM, Ingo Flaschberger wrote:
>> 
>> For standard 110V service, you use a single-wide breaker and send one hot 
>> phase + neutral and you get 110V. The difference between two phases is 208 
>> volts though, so you use a double wide breaker and can send to device 
>> without using a neutral wire. Just 2 hots and a ground. If that's all you're 
>> doing (you don't need legacy 110V service anywhere) you skip the ground wire 
>> going into the panel entirely.
> 
> that one looks dangerous.

Err, I meant "skip the neutral wire". It's still grounded. And there are 
normally significantly more covers over the panel than this, there were a dozen 
screws I had to remove to expose all of this. :)

This is a much smaller scale panel though, not far up from a typical home 
system. The more current you start talking about, the more isolated everything 
becomes until you wouldn't even be able to see the bus bars like in this one.

-- Kevin





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