[Amps] 220 LINES

Robert B. Bonner rbonner at qro.com
Sun Feb 4 11:31:03 EST 2007


Here we go again,

Subject matter: Power wiring to power amplifiers AKA how to connect a plug
to your amplifier.

The INFAMOUS  NEUTRAL / GROUND comment resurfaces.

There is no situation where a Neutral and a Ground are the same thing.  They
may get bolted together under certain conditions, but are not the same
thing.  This is why a ground is a green wire and a neutral is a white wire.

In a two wire (ground not counted)  220/221 circuit (whatever it takes) the
ground should never conduct current unless there is a system fault.  If you
require 120V along with your 220/221V you pull a neutral.  In a three wire
220/221 circuit where a Neutral is added, the Neutral is wired to a terminal
strip inside the amplifier NOT THE CHASSIS.

Why would you need a neutral?  If your equipment ran on 220/221 plus also
required one or two circuits of 110-120V also. This installation would
require a 4 conductor plug and a 4 conductor line cord to meet CODE.

How does most manufacturers get away with using 120V inside and box and
still only have a three wire (2 hots and a ground) cord? They use a 220/221
to 120V step down transformer)

Yes I have been silly referring to 220/240 circuits as 220/221 whatever it
takes...

Neutral never equals Ground.

BOB DD




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