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The UKHA-ARCHIVE IS CEASING OPERATIONS 31 DEC 2024


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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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