Why choose 120 volts?

Chris Adams cmadams at hiwaay.net
Tue May 26 18:51:42 CDT 2009


Once upon a time, Joe Greco <jgreco at ns.sol.net> said:
> And I don't like not having anywhere to plug in my power screwdriver's
> recharger...  I suppose I should see if I can find someplace that has
> a transformer of an appropriate size, or does anyone already have the
> part number for something that can provide a few hunderd milliamps of
> 120V from 208?  :-)

Isn't 208V usually provided as a connection across two phases of a 3
phase circuit?  In that case, you get 120V by going between one phase
and neutral (no transformer required).

You need a NEMA 14 (4 wire) connector to get two phases, neutral, and
ground (provides 1 208V circuit and/or 2 120V circuits) or a NEMA L21
(5 wire) connector to get all three phases, neutral, and ground
(provides 3 208V circuits and/or 3 120V circuits).

-- 
Chris Adams <cmadams at hiwaay.net>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.




More information about the NANOG mailing list