[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
240V feeder and HV cabinet ground question
- To: tesla@xxxxxxxxxx
- Subject: 240V feeder and HV cabinet ground question
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Fri, 03 Jun 2005 00:24:26 -0600
- Delivered-to: email@example.com
- Delivered-to: firstname.lastname@example.org
- Old-return-path: <email@example.com>
- Resent-date: Fri, 3 Jun 2005 00:24:53 -0600 (MDT)
- Resent-from: tesla@xxxxxxxxxx
- Resent-message-id: <qQONpD.A.hUB.0e_nCB@poodle>
- Resent-sender: tesla-request@xxxxxxxxxx
Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
I am planning to put my 14400/5KVA along with my HV DC components in a
gutted Swimming Pool cabinet. The cabinet will be bolted to a preexisting
concrete slab. It is about 50 feet from my dedicated 60 amp Pump safety
switch. Witch is well grounded to the mains (#4)20 feet away and a copper
water pipe. That is probably a neutral no-no but it is close. This is where
my control rack will be rolled.
The ongoing saga of ground questions:
1. The HV cabinet is at nearest 8 feet from one of three RF ground rods
(maybe not connect this one to the coil?).
2. I have 70 feet of AWG# 8 direct burial w/ground, 18" ground cover, a
minimum 16 feet parallel to the TC planed location.
3.IMPORTANT: shall the HV cabinet thoroughly grounded with the mains along
with the case lug of the Pig (no neutral connection). HV out will be floated
on both sides via 50KVDC cable 10 to 12 feet long.
Note: current limiting will be entirely attempted by break rate and a large
variac for voltage ramp up. And yes I have a breaker box adjoining the
safety switch with 30, 40, and 50 amp main breakers at hand. The control
cabinet has a large contactor in it and will be energized by a remote fiber
momentary dead man switch.
Any help on question #3 will be greatly appreciated as I view it as a safety