[AMRadio] 220 vac line

[BILL GUYGER]

Rick

After all the other replies this may be pointless but the National Electrical 
Code differentiates between Neutral and ground which are both grounded at the 
service entrance by calling Neutral the GROUNDED conductor and the safety ground 
the GROUNDING conductor, meaning that Neutral while it is grounded carries 
current. The Grounding conductor which is always Green (but Green with a Yellow 
stripe is allowed) does not. If the green wire is carrying current "you got 
problems son". Neutral must be either White or Gray. 


On your 240V line (and your line voltage will be 240 not 220) you are only 
interested in the hot legs which are both ends of your center tapped service 
transformer. The center tap is the grounded Neutral so that there is 120V either 
side of CT and 240V across the ends of the winding. Your 240V load does not need 
the Neutral (Center Tap) just the single phase hot legs and a safety ground.

Bill AD5OL




________________________________
From: Rick <rickb at tx.rr.com>
To: Discussion of AM Radio in the Amateur Service <amradio at mailman.qth.net>
Sent: Sun, July 24, 2011 8:43:59 PM
Subject: [AMRadio] 220 vac line

I'm sure this has been discussed but my memory refuses to let the info go. I
am wiring a 220 VAC line into the new shack and I am uncertain about the
neutral and ground wires. I installed a new sub panel complete with
isolation buss bar for the neutral (white) wire from the 220 outlet. The new
sub panel has the neutral buss bar grounded to the main panel ground buss
bar. This is the way I understand it is supposed to be. The outlet I am
installing is a 20 amp 3 wire (two hot, one ground) unit. My concern is, do
I use the bare ground or the white neutral wire for the ground lug on the
outlet? Also, do I simply leave the unused of the two (white or bare)
disconnected in the new sub panel?

Thanks for any assistance and advice.

Rick / K5IAR

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