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Old 07-02-2021, 08:00 AM
kf4rca kf4rca is offline
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Join Date: Feb 2015
Location: Atlanta
Posts: 742
So you live on a 4KV circuit? Wow- that's old. That's what they started out with.
The new stuff is 13.8/23.9 KV. The 4KV transformers are usually dark gray and the 13.8 transformers are light gray. Also the new transformers are larger with larger insulators on them.
Most 4KV distribution is single phase and uses #6 hard drawn copper for the lines. The 13.8 stuff can be single or 3 phase. The insulators are larger and the lines are usually ACSR cable (Aluminum Covered Steel Re-inforced).
SCE&G still had some 4KV stuff out on the rural coastal island communities, so its still around.
Another device you might see on poles are OCR's. The oil circuit reclosers are automatic circuit breakers filled with oil. They are round with two insulators out the top.
Both capacitor banks and OCR's are used on 3 phase lines.
Did you know that up until 2007 Consolidated Edison in NYC offered DC to its wharehouse customers that still used DC elevators?
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