Well, yes, because the IEC tends to believe that rated values are
realistic and do not need to be adjusted downwards. I suspect that at
some point in the distant past (maybe even nearly 100 years ago), some
connectors in wide use were found to overheat at rated current, so the
'derating rule' was brought in, and no-one has challenged it since.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2017-10-10 20:12, Ralph McDiarmid wrote:
The NEC (NFPA 70) talks about “continuous currents” and when to apply the
all-too-familiar 125% rule. Canadian Electric Code (CSA part I) has same
requirement. The IEC seems to have avoided it.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
D 604-422-2622
From: Kunde, Brian [mailto:brian_ku...@lecotc.com]
Sent: Monday, October 09, 2017 8:31 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] NEMA 5-20P with IEC 60320 C13
It is my understanding that according to the US National Electric Code, 15 amp
receptacle are derated to 12 amps max., and 20 amp receptacles are derated to
16 amps.
IEC 60320 C13 connectors are rated 15 amps in North America. Do I derate them
as well or can I draw 15 amps continuous from the C13 connector?
So here is the big question:
If I have a power cord with a NEMA-5-20P at one end, IEC 60320 C13 at the other
end, and 14awg cordage (rated 18A), can I use/ship this power cord with a
product rated 15 amps?
Thanks to all.
The Other Brian
________________________________________
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