[AMRadio] 220 vac line

[Paul Christensen]

> 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?

What's the use of the new receptacle?  Dedicated for an amp?

Use the bare ground wire for ground throughout the pull to the new 
receptacle's ground terminal.  If neutral won't be used to power a 
240/120VAC, then receptacle and plug can be wired for 240VAC only, using L1, 
L2, and G, abandoning the use of the white neutral.  The ground and neutral 
bars at the sub-panel are not connected together.

> Also, do I simply leave the unused of the two (white or bare) disconnected 
> in the new sub panel?

If this is a 240VAC receptacle only, the white neutral isn't required.  But 
why not also pull a neutral all the way to the receptacle (3-pole, 4-wire 
type) and have it available for older commercial amps like Alpha 70/77 
series, Henry, etc.?   Some older commercial and homebrewed amps use a 120V 
blower, requiring a neutral.  It's a lot easier doing it once than having to 
re-visit it again in the future.

Paul, W9AC