Electric ranges used to have a 110 VAC outlet in which the ground and
neutral were wired together. (The 220V plug had only three prongs.) I
always wondered how they got away with that.
Alan N1AL
On 12/24/2014 01:50 PM, Jim Brown wrote:
On Wed,12/24/2014 11:41 AM, Charlie T, K3ICH wrote:
A lot of the older amps (Thunderbolt for example) had 120 V fans
wired from one hot to ground. I always wondered about that.
I think that used to be legal, but it is no longer, and it's very bad
practice.
The better ones (Ten Tec Titan, for example) run a 120V fan between
one side of the power transfomer primary and the center tap. It is now
illegal for the Green wire to carry load current.
On Wed,12/24/2014 11:13 AM, Phil Kane wrote:
IIRC the latest code update now requires the separate neutral ("white
wire") to be run in all 240V circuits. I did that in a 1969 when I
finished the basement in a year-old home!
You may be confusing a 120/240 outlet that has a four circuit plug
(phase, phase, neutral, and Green) and can serve both 120V and 240V
loads, with a 240V outlet that has a three circuit plug and serves
only 240V loads. There is no neutral in a 240V outlet, and as noted
above, it is illegal to connect a 120V load between one phase and the
Green wire (Equipment Ground). That 120/240 circuit can feed both
120V and 240V outlets. A neutral IS required to feed those 120V outlets.
73, Jim K9YC
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