>>>3) What about portable generators, and folks back feeding the grid
or house with little to no protection at all.
Luckily, if the house is still connected to the grid when they try this,
the little generator will not be able to
power the neighborhood. Maybe not even the pole pig transformer's
magnetizing inductance current in
some cases ? It would more than likely trip the generator breaker or
slow down its engine or just
stop the generator completely or toast it.
boB
On 8/28/2014 2:28 PM, Ray Walters wrote:
So this would make sense that this Rapid Shut down provision would
cover all generator backup systems too, not just solar.
Considering auto start backup generators have been around for many
decades, I have a few questions:
1) Does NEC 2014 require Rapid shutdown for all generator systems, or
is solar once again being singled out for additional requirements not
applied to everyone else?
2) What is the history of fire fighting and backup generators? It
seems that there would be much more long term experience, than a hand
full of incidents in the solar industry.
3) What about portable generators, and folks back feeding the grid or
house with little to no protection at all. Are there safety
precautions that fire fighters take to make sure a neighbor isn't
powering up lines down the street? I've seen too many male to male
extension cords, so I know this is real issue, that can't be prevented
by the NEC code alone. Basically any idiot can go to Home depot and
create a very dangerous situation quickly.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/28/2014 1:16 PM, b...@midnitesolar.com wrote:
It would also make sense to shut off an auto start generator with
the Rapid Shutdown button. Some generators are designed to start up
upon loss of grid. Once the first responders have the meter pulled,
that could start up a generator and cause risk of shock.
Robin Gudgels
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