IRIS Power Series power supply questions

From: Pete Turnbull <>
Date: Mon Jan 28 14:41:50 2002

On Jan 28, 12:17, Christopher Smith wrote:
> Hi everybody,
> In preparation for my eventual booting of the IRIS Power Series
> machine, I pulled the back off yesterday and inspected the power
> supply, etc.
> The square-ish plugs should all be plugged in to the plug they
> match. (I thought this one was pretty safe.)

That would be my assumption too.

> The three loose post-screws go to the three wires that were just
> floating around loose (coming directly (more or less) out of the
> twist-lok plug. These screws are labeled N~, L~, and <earth
> symbol>
> The Earth pin on the twist-lok plug is the longer one. (made sense
> to me, but I can't find anything to confirm it...)
> The L~ probably stands "Live" or something like that (?)
> The N~ probably means "Negative"

L is Live (or Line in the US), N is Neutral.

> The positive lead on the twist-lok plug is the one that has the
> breaker on it.
> Given that logic:
> The L~, being positive, should be attached to the wire with the
> breaker in it.


> The wire connected to the long pin on the plug should be connected
> to the <earth symbol> connector.

Yes. The reasoning is that the earth connection should always be the first
one made and the last one broken in normal connection/disconnection.

> The other wire should be connected to the only loose-screw left.
> There is further evidence in the way the wires were bent, which
> suggests that this is all correct.
> Has anyone see these things before, and can possibly confirm this?

Yes. The live wire is always the one with the switch, breaker and/or fuse,
unless it's a two-pole breaker (one pole for live, one for neutral) of

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Mon Jan 28 2002 - 14:41:50 GMT

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