Hello Bill,
At the generator, the neutral and ground is normally connected together. In
a generator installation, we are require to drive a three foot ground rod
next to the generator and connect the generator ground to this.
As for the EV in providing emergency power to a building, there is a section
in the NEC, that it states, that a electric vehicle shall not be use for
emergency power for a building.
The reason for a standard EV not to be use as a emergency power source, is
that there may be no phase lose protection, low voltage protection, and
transfer switch devices as emergency generators have. You must also have
mechanical protection for your feeder wires to a transfer switch that is
than hard wire into your emergency panel. If you have equipment that have
these safety equipment in it or you design this safety equipment and submit
it to the state electrical board and then you set up a test and demo with
all the instrumentation to prove it works safety for approvable, then you
may get a exception to the NEC rules. This is how we can get some of the
NEC exceptions or changes made.
Roland
----- Original Message -----
From: "Bill Dennis" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Wednesday, October 10, 2007 8:27 AM
Subject: [EVDL] Vehicle to Ground
> We have frequent power outages at our house, so a few years ago, I wired
> up for receptacles that were totally separate from the house's main
> wiring system. During a power outage, I'd feed power from a portable
> generator into these receptacles with a generator, to keep the house's
> heating system, refrigerator, TV and a few lights working. The
> generator sat on rubber feet, so was not connected to the ground. Now,
> instead of a generator, I use the EV's traction pack, which again is a
> floating ground. So my two questions are: do I need to tie the
> traction pack to ground when I'm using it this way, or is it okay to
> leave ground floating? And even more basically, have I broken any NEC
> rules wiring the outlets this way?
>
> Bill Dennis
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
At the generator, the neutral and ground is normally connected together. In
a generator installation, we are require to drive a three foot ground rod
next to the generator and connect the generator ground to this.
As for the EV in providing emergency power to a building, there is a section
in the NEC, that it states, that a electric vehicle shall not be use for
emergency power for a building.
The reason for a standard EV not to be use as a emergency power source, is
that there may be no phase lose protection, low voltage protection, and
transfer switch devices as emergency generators have. You must also have
mechanical protection for your feeder wires to a transfer switch that is
than hard wire into your emergency panel. If you have equipment that have
these safety equipment in it or you design this safety equipment and submit
it to the state electrical board and then you set up a test and demo with
all the instrumentation to prove it works safety for approvable, then you
may get a exception to the NEC rules. This is how we can get some of the
NEC exceptions or changes made.
Roland
----- Original Message -----
From: "Bill Dennis" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Wednesday, October 10, 2007 8:27 AM
Subject: [EVDL] Vehicle to Ground
> We have frequent power outages at our house, so a few years ago, I wired
> up for receptacles that were totally separate from the house's main
> wiring system. During a power outage, I'd feed power from a portable
> generator into these receptacles with a generator, to keep the house's
> heating system, refrigerator, TV and a few lights working. The
> generator sat on rubber feet, so was not connected to the ground. Now,
> instead of a generator, I use the EV's traction pack, which again is a
> floating ground. So my two questions are: do I need to tie the
> traction pack to ground when I'm using it this way, or is it okay to
> leave ground floating? And even more basically, have I broken any NEC
> rules wiring the outlets this way?
>
> Bill Dennis
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev