Went into addition friend of mine is doing and he had a 125a sub panel w/no main breaker.It was feed from a 200 amp panel.He says the builder told him that since he only had 3 wires coming to the 200a panel all he needed was 3 to the sub.I`m I correct in that if the panel he`s feeding from has more than 6 breakers he needs the main?He also needs 4 wire to the sub panel.Thanks in advance.
