[BC] AC Voltage Drop

[towers at mre.com]

I don't recall a specification for service voltage at the primary service
disconnect other than the equipment must be rated for that service class.

The spec. for what is an acceptable service range typically comes from the
local/state regulators. Also, the utility is not bound by NEC.  They have
their own code to conform.  So what you might expect a 3/0 THHN for 200A
service might be really 1/0 between the X-former and the meter.

Depending on the cable type, the cable can and will make a difference on
that distance.  In Illinois, if there is a question about the voltage
drop, the customer can install a heavier than normal cable. But they must
pay for it.

MM

> To the NEC guru's on the list -
>
> Can anyone direct me to the paragraph(s) in the NEC handbook which
> reflects what kind of voltage drop is permissible from an electrical
> provider from no load to full load.  This is for a a 240 volt - 3 phase
> Open Delta AC circuit.
>
> The power transformers on the pole are within 150 feet of the load.  The
> 3 conductor wire (and neutral) between the ransformers on the pole and
> the fused disconnect panel are sized for 200 amp.
>
> Danny Ray Boyer