code question (counting handles)
I have an electric code question. I understand that until 1968, 6 handle throws were allowed to turn off power to a residence. I have seen several split bus panels that are built to take advantage of all those 6 throws.
Some of you have seen the pictures of my three-ph residential service. I have two main panels. One is a split bus panel with 6 mains. The other is a very conventional three-phase panel (single main). They are connected to the meter in a big splice box. My question is, could anything installed in the time of circuit breaker panels have ever met electrical code?
It seems to me that it would have met code requirements if 6 or fewer actual throws were allowed that it would have until 1968. That is because not all of the mains in the split-bus panel are in use. If the POTENTIAL number of throws, assuming that all main breakers can be used are counted, the total is 7 since there is a second panel.
How were they counted?