Not sure but someone else may have answered your reply but, if not, here is my
reply.
First, you shouldn't confuse the green wire with a neutral. It is not a
neutral, it is a 'grounding' conductor - that is, it is intended to ground the
metal parts of the electrical appliance (e.g. your HL-1K). The neutral wire is
usually the white wire and it is usually connected to the unswitched side of
the load. The hot wires (typically black for 120 VAC or black and red for 240
VAC) are the wires normally switched.
I was able to locate a schematic for the HL-1K amplifier on the net (nice amp,
by the way!) and I would hook it up this way:
120 VAC 3-wire
Black 120 VAC input switched input (check schematic)
White Neutral - other 120 VAC input
Green Ground - connect direct to chassis
220 VAC - 4 wire
Black 220 VAC input
Red Other 220 VAC input point
White Neutral (no connection - any internal 120 VAC loads (e.g. fan)
are provided by HL-1K transformer)
Green Ground - connect directly to chassis
So there you - my best guess
73
Bob Groh, WA2CKY
________________________________
From: Kevin LaHaie <klahaie@centricata.com>
To: Robert Groh <rgroh@swbell.net>
Cc: MIKE DURKIN <patriot121@msn.com>; amps@contesting.com
Sent: Friday, August 28, 2009 12:48:11 AM
Subject: Re: [Amps] HL-2K
I have an HL-1K from THP, and the power cord is only 2 conductors. The manual
gives wiring schemes for 100v, 110v, 117/120v, 200v,220v, and 234/240v.
Only the 2 leads are illustrated (obviously a hot / neutral for 100-120v, 2
hots for 240v). It shows no ground OR neutral connections to the wiring
terminals.
So I am also curious to see what is recommended to wire one of these early THP
amps for single phase 240v if putting the green (neutral) wire to the chassis
is a no-no. (obviously I had planned to put a 3 wire cord on this amp, perhaps
now it will need a 4 wire?)
73 Kevin K7ZS
Robert Groh wrote:
> No, no, never connect the neutral to any ground (e.g. the case, the grounding
> conductor in the 4-wire line, etc)!
>
> That is a violation of the electrical code and dangerous on top of it. I
> can't tell you what use the HL-2K uses - hopefully someone can give the
> answer on what you do with the neutral connection. The neutral (in
> combination with 1 of the hot wires) is used to give you a 120VAC power
> connection (for relays, small power supplies, fans, whatever).
>
> 73
> Bob, WA2CKY
>
>
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