[AMRadio] 220 vac line

[Rick]

Thanks Bill and all others. What threw me off or at least made me wonder was
the sub panel addition. In the main panel the white (neutral) and ground
(bare) are tied to the same grounding buss, but in the sub panel the white
goes to an isolated buss and the bare goes to the grounded buss. I
understand why, but was a little leery about which I should use as a ground
return since the 220 (actually, mine is 237 - but old habits die hard) is
coming from the sub panel. Grid leak bias was easier for me to get through
my thick head. HI HI

Thanks again to everyone!

Rick / K5IAR

-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of BILL GUYGER
Sent: Monday, July 25, 2011 12:23 PM
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio] 220 vac line

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