This is for the same job as the type of 3R panel I was inquiring about a couple of days ago.
The PoCo here is planning on running 4/0 triplex to feed streetlights off of a 100A DP breaker from the panel. Obviously, the first thing I thought was that 4/0 will not fit in a 100A SQD QO breaker although they can easily use Polaris fittings to reduce the wire size to fit.
What's got me is this just seems to be a poor design. I've never done street lighting or parking lot lighting and really do not want to so I guess I can't really make that assumption
This has got me thinking though; Is there anything in the NEC from preventing a 100A DP breaker from feeding however many streetlights are going to be installed? I've searched and searched and can't come up with anything. Seeing the earlier post at MikeHolts
about parking lot lighting utilizing multiple 20A breakers got me thinking about this.