I would like to know what size aluminum sec I would need for 100 or 200 amp service

I'm installing a 100 amp service in the backyard with a separate meter on a pole next to sub-suface power tranasformer. I have a 100 amp meter box on one side of the pole and a 100 amp braker panel with a 100 amp main breaker on the other side. I'm going to place in it a 15-20 amp breaker for gfi...

Hi All! I currently have an old 40 amp service in my pre-war condo. We are allowed to run BX securely attached for a new service. The distance is 250 feet. I am looking to get a 100 amp service. What size BX cable should be used for this? Do they make BX large enough for a 250 foot 100 amp...

If a manufacturer says their compressor can be used in a 2-1/2 ton compressor when the design ambient temperature is 100 F and the evaporating temperature is 45 F how do I measure/verify these temps for my location? Is the design ambient temp the outdoor temperature? Is the evaporating temp the...

This in reference to a regular size commercial run