Quote:
Originally Posted by 3rd_gear_Ted
Most homes have the 2 phases of Line power disconnected by the rated panel main Circuit Breaker AFTER the meter socket.
Unless you physically disconnect the feed @ the Weather Head, the Meter socket will remain hot in most homes.
Common practice in the trade is to ask the guy holding two hot utility lines in his hands; what time it is?
Performing a "Hot Tap" with split nuts or a crimper is not for those without the knowledge, skills or equipment.
|
It's a split phase, not 2, but that will get you by when comparing to 3 phase. In Europe they have 230v single phase. We get 240 volts by instead of sending the 120v to ground we connect them together through the load. It derived from a single phase high voltage transformed into 2 taps in the transformer 180º apart as alternating current.
True, I wouldn't want anyone to fool with unprotected line feed not knowing what potential is. And pulling a meter when the panel is under load can be a bad idea. Like placing your laptop power supply in a receptacle will arc a little, the meter can arc a lot.
To answer the question about upgrades affecting wiring beyond the proposed new work, generally speaking if it it not touched it can remain. However, it you moe circuits over to a new sub then whatever code you are under applies. Since 2020 AFCI breakers are required on all receptacles in the house except the kitchen that has GFCI protection. The 2023 code requires both in kitchens, laundry and bath as well as outdoors.
Here is the code status for the U.S.
NEC 2023 adoption is complete in Colorado, Massachusetts, Minnesota and Wyoming.
NEC 2023 adoption is underway and NEC 2020 adoption is complete in North Carolina, Oregon, South Dakota, Texas and Washington.
NEC 2020 adoption is complete in Alaska, Arkansas, California, Connecticut, Delaware, Georgia, Hawaii, Iowa, Louisiana, Maine, Montana, New Hampshire, New Jersey, North Dakota, Oklahoma, South Carolina, Utah, Vermont and West Virginia.
NEC 2020 adoption is underway in Florida, Idaho, Indiana, Kentucky, New Mexico, Ohio, Tennessee and Virginia.
NEC 2017 is adopted in Michigan, Nevada, New Mexico, New York, Pennsylvania and Wisconsin.
NEC regulation occurs only at the
county/municipal level in Alabama, Arizona, Illinois, Kansas, Mississippi, Missouri and Nebraska.
The bolded wording is a problem.