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From: Spehro Pefhany
Subject: Re: Current draw of several light bulbs?
X-Newsreader: Forte Agent 1.92/32.572
Date: Wed, 11 Dec 2002 17:37:14 GMT
NNTP-Posting-Date: Wed, 11 Dec 2002 12:37:14 EST
On 11 Dec 2002 17:09:15 GMT, the renowned firstname.lastname@example.org
>>Yor calculations seems to be correct. What is the input power
>>source? AC line? Looks like a simple transformer is all you
>>need. Safety can be an issue in outdoors applications. In this
>>case it's always better to use the isolated supply - same
>>transformer. Making a fancy switching supply just to drive few
>>bulbs looks like an overkill to me.
>My intent is to simply use a step down transformer from the 110 VAC wall
>socket. Someone else mentioned in rush current. Anyway to calculate that? In
>other words, if I assume that I will need 6.3 amps to drive the lamps, what
>capacity of a transformer do I need to account for the inrush. 7.5 amps would
>be about 120% of the in service current. Is 120% enough???
Forget about it entirely from the POV of the tranformer rating.
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