CTL vs Non-Ctl; Now what can I do
OK I understand the difference between CTL and Non-CTL. I am becoming confused. I had a licensed electrician give me a quote to install a 100 amp 2 pole breaker into my 40 space panel. But he would have to use tandem breakers in order to get the 2 pole breaker to fit. When I reviewed the panel, it states the breakers which can be used and BR breakers are acceptable. However since this is a ctl panel and all the slots (40, but only 39 poles) are used, he would have to get the tandem breakers which the only ones I see can fit are non-ctl. When I question him on non-ctl vs ctl he did not understand. I have queried several electricians and I am getting the same answer. They will use tandem breakers and place the 2 pole 100 amp in the remaining open slot. This would put my panel at 41 poles, below the 42 limit.
What can be my other options if I cannot use the tandem breakers? I believe they are install a sub panel, but due to the panel location I would have to tear out the dry wall, cut through double header 2 x 4's or I guess I can install a 320 meter base, but I am not sure the service wire will handle it. Can I place a sub panel on the outside of the house? I do not want to do this, but I cannot come up with other options. All the electricians state they will install the tandems.
IF I install a sub panel do I have to use conduit in the garage walls? I can go up inside the wall to the attic and come down the other wall and install the sub panel. Also if I do this can I run wire from the sub panel through the main panel to the outside wall where I would then use schedule 80 PVC to run underground. From your statements I am not to confident in the electricians I have been getting quotes from. I believe it is because I live in the country where there are no city codes. Thank you for your assistance.
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