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Old 05-23-2011, 06:30 PM
nickyfzr nickyfzr is offline
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Join Date: May 2011
Location: USA
Posts: 1
Default Why an 80% cushion?

Hello all
New to this forum and kind of new to data centers. My question is why do we not go above 80% of a power strips rating and would it be okay to ocassionaly go over that 80% limit without surpassing the total breaker rating.

Thanks in advance for your time.

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Old 05-25-2011, 02:45 PM
kdebs kdebs is offline
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Join Date: Mar 2011
Location: Detroit, MI
Posts: 12

That 80% is mandated in the USA by the National Electrical Code. For continuous use (3 hours or more, i.e. servers that are always on inside a data center), circuit breakers are rated at 80% of their nominal capacity. It's okay to go above 80% use, but it's not okay to stay there.
Colocation & data center services in Detroit Michigan.
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Old 06-04-2011, 11:54 AM
emad emad is offline
Join Date: Jan 2011
Posts: 61

So do you think it is only for US datacenters?
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