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Re: How Much?
- To: ukha_d@xxxxxxx
- Subject: Re: How Much?
- From: Nigel Orr <nigel.orr@xxxxxxx>
- Date: Fri, 17 Dec 1999 11:02:45 +0000
- Delivered-to: rich@xxxxxxx
- Delivered-to: listsaver-egroups-ukha_d@xxxxxxx
- Mailing-list: contact ukha_d-owner@xxxxxxx
- References:
<c=GB%a=_%p=BDBC%l=EXCHANGE1-991216165947Z-15180@xxxxxxx>
- Reply-to: ukha_d@xxxxxxx
At 00:07 17/12/99 -0000, you wrote:
>I'm going to gather these messages and edit them into a page for my
website.
Are you now? Maybe you should ask the copyright-holder first?
>I also want to add a little section at the end on actually measuring
this
>power. Are there any specific ways of doing it, other than the rather
unsafe
>method of putting your ammeter in the power feed?
Yes. Full answer available on payment of a consultancy fee ;-)
Easiest short answer is to use a clip-on ammeter, but you still need to
isolate the Live or Neutral wire- if both go through the clip, the current
reading should be zero...
You also need to bear in mind that VA!=W... if you want to measure real
power, you're probably best to put a wattmeter in the system- I understand
Maplin make a cheap one, but I'm not sure if it's measuring W or VA.
The easier way is to use a system with a 12V power supply and just measure
the current with an ammeter (well that's what I find easiest...!)
Copyright 1999 Nigel Orr
Nigel
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