Originally Posted by saabracer23
I can't do 240 as this is for my bedroom theater and I don't want a 240v line in the master when we decide to move on to a bigger house. The panel is really close, it'll only be like a 15 foot run even with all the bends, maybe 20 feet. I'll just go 10-2 or 8-2 then if a 20 amp breaker and recepticle don't cut it I have the wire installed to upgrade to higher amperage.
A run of #10awg will be fine.
Remember, a branch circuit breaker can easily pass enormous amounts of current past the normal rated size;
For example, a 20 amp circuit can pass 7-8 times the rated 20amp trip amount, .. for up to a second or more.
It will allow up to 3x the rated amount for up to 10sec or so.
And the same 20amp circuit, can allow up to 1.5-2times the rated amount for a period extending as long as 30 seconds.
So, 30a-40a, for up to 30seconds, ... 60a for around 10seconds, ... and 140a or more for brief pulses of as long as a second!
This is why a 20amp breaker is fine, .. and why we upsize the wiring. There's no safety issue with the mammoth currents thru the wiring .., it's just lossy (Edrop) ... and any chance to lessen voltage drop during those big demand moments is a worthy one.
Originally Posted by whoaru99
You're going to have a dandy of a time trying to connect 8ga wire to a standard receptacle, I think. 12ga is bad enough to mess with, let alone 10, or 8.
12awg or even 10awg is no problem, #8, yeah, it won't all fit. Any time a wire's cmil is too big for the connection, and the wire size is a preventative measure for potential voltage drop, removal of strands until the wire fits is commonly accepted and electrically sound approach.
Also, one can "tail out", and utilize an appropriate wire size for the receptacle. Just make joints and connect the bigger size of the entire run, to a short 6" section of a size that fits. No biggie. This is how voltage drop upsized wiring is accommodated.
Hope all this helps