L6-20P -> L6-30R

William Herrin bill at herrin.us
Wed Mar 19 16:24:38 UTC 2014

On Wed, Mar 19, 2014 at 11:22 AM, Lamar Owen <lowen at pari.edu> wrote:
> Just replacing an L6-20P with an L6-30P on a 20A-listed PDU would be unsafe
> and (IMO) unwise, since the breaker in the input of the PDU does not protect
> the flexible cord's conductors from internal overcurrent faults.

Yet an 18 awg PC power cable is perfectly safe when plugged in to a
5-20R on a circuit with a 20 amp breaker. Get real man.

You got two things right:

The NEC (and related fire codes) don't apply to supply cords of
appliances in circumstances such as OP's PDU.

The modification cancels the UL certification. If you have an external
requirement to use only UL certified components then you can't make
any modifications no matter how obviously safe they are.

By the way, you either don't have that requirement or you're breaking
it. Your custom network cables are not UL certified.

Bill Herrin

William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004

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