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Member

Join Date: Oct 2006
Location: Kampala
Posts: 7

Electrical Installation Audit

10/03/2006 11:57 AM

Hi All,

I need to conduct an electrical installtion audit for a bank premises. Does anyone have a template or format for conducting this exercise? This involves air-conditioners, computers, lighting and general appliances found in a normal offcie setup in East Africa, i.e. no room electric/gas heaters.

Mbalu

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Anonymous Poster
#1

Re: Electrical Installation Audit

10/04/2006 7:43 AM

If depends why you are doing the audit. I am assuming you are assessing connected load. If so this could be a long and tedious process. I would start by at the utility incomer and work your way down stream. In end you will have a whole bunch of nameplate data (you may need to pull data sheets for the electronic equipment). I would then sum my kW load and divide by a conservatively estimated power factor. This would give you a good idea of your actual connected load in KVA.

Keep in mind that the method discribed will help you assess your actual connected load at the time of the audit. If you for instance were sizing a back up system you would approach this differently. If this is your end goal then you need to consider you connected load a little different. One example would be considering the rating of a duplex receptacle (assuming the upstream breaker is sized correctly) rather than what's plug into it unless you can gaurnetee the installation at the time of the audit will not change. Another situation you may need to treat differently would be the way you handle your motor loads (running versus starting).

At face value this seems like a simple task but depending on what you are doing with the information you might want to go about it differently. Sizing back-up systems should be a thankless job if you do it right.

As for the template I wouldn't trust one even if you find one, see it as a starting point.

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Member

Join Date: Oct 2006
Location: Kampala
Posts: 7
#2
In reply to #1

Re: Electrical Installation Audit

10/04/2006 10:28 AM

Thanks a lot. Will gor for it.

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Anonymous Poster
#3

Re: Electrical Installation Audit

10/05/2006 6:08 PM

You might look at the United States' "National Electrical Code"--NFPA-70 for some help. Granted that many factors will be different between your country and the USA, particularly as they relate to people and culture. However, the types of equipment and their loads are probably much more consistant. The NEC has a section, Article 220 I believe, on sizing services and feeders. This has been developed from over 100 years of experience on what works and what doesn't, and probably can give you some useful rules for when demand factors can be used and when not. Such a resource does have one limit--it is intended as a minimum standard, and is not a how-to-do-it guide. I don't know what you are trying to accomplish in your audit, but if it is a measure of comfort for people and a guide to probable areas for improvement, then I expect the previous replies and this will all be useful to you.

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