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Old 06-12-2007, 08:00 AM   #15
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Originally Posted by lewster
If you read the gen instructions, you will see a little note that says to GROUND THE GENERATOR. That's why there is a binding post on the front panel of the units marked 'GROUND'.

As I stated above, the electricity needs a pathway (for safety reasons) to return to ground if the neutral fails for any reason. Avoid it at your own risk.



what about the onan gen built in to the tt and moho.they don't say to put in a grounding rod.so much confusion on this subject.
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Old 06-12-2007, 08:09 AM   #16
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All Mohos that use generators have an internally connected ground; the system is closed. My '98 Monaco had a Onan 7500 watt diesel gen that was grounded to the system thru the transfer switch, so the mechanical and electrical grounds (neutral) were always connected in a closed loop.

I suppose that you 'could' do the same for an external gen for your trailer, that is.....connect it to the trailer ground and then rely on the ground contact of the front tongue jack and the stabilizers to provide the earth contact. It would work, perhaps not as efficiently as a direct grounding rod.
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Old 06-12-2007, 11:13 AM   #17
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The 3 prong grounded cord does bring the generator and the trailer to the same plane. This is the best way to have it. If you want to ground something ground the trailer. Just make sure your tow harness (brakes, lights, etc) is disconnected.
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Old 06-13-2007, 01:04 AM   #18
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But you aren't grounding anything by doing that....think about it. If you plug into shore power there is a ground rod somewhere in the system. The Airstream itself is not grounded, the truck is not grounded. If you don't ground the generator it isn't grounded.
and they don't read the directions that come with them that say that it requires grounding. I have seen someone get a pretty good jolt when a tool had a bad ground wire on it, and the generator wasn't grounded. People have been killed when something has gone wrong and the generator wasn't grounded. I am not an electrician but I know that you have to be grounded to a ground rod for safety. Can you get away without a ground rod, yes but eventually, somewhere, somehow, someone is going to get killed by not using one.


Aaron
Hi, once again, with a three wire set-up on the generator and a three wire hook-up on your trailer, you don't need another ground connection. Note: read post #17 from Michelle. And lastly, you answered your own question by saying, "I have seen someone get a pretty good jolt when a tool had a bad ground wire on it, and the generator wasn't grounded." You could have a ten foot copper ground rod attatched to your generator, but if the defective tool has the bad ground in it, you will still get shocked.
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Old 06-13-2007, 06:10 AM   #19
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You can say what you want and do what you want, as for me, I am not going to carry around a 6ft. spike and drive it in the ground every time I use the gen.
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Old 06-13-2007, 07:29 AM   #20
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Quote:
Originally Posted by ROBERTSUNRUS
Hi, once again, with a three wire set-up on the generator and a three wire hook-up on your trailer, you don't need another ground connection. Note: read post #17 from Michelle. And lastly, you answered your own question by saying, "I have seen someone get a pretty good jolt when a tool had a bad ground wire on it, and the generator wasn't grounded." You could have a ten foot copper ground rod attatched to your generator, but if the defective tool has the bad ground in it, you will still get shocked.
I went back and read the manual on my Honda Generator, then pulled up the newest version of the manual online. Apparently lawyers have gotten involved. My original manual calls out for the generator to be grounded to a "suitable ground" The newest version of the manual says to contact a qualified electrician or refer to current codes. I still contend that you are opening your self up to a shock if there is no lead to a ground rod. FWIW I don't use a 6' ground rod for temporary power service I use a 2-3'.

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Old 06-13-2007, 08:24 AM   #21
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There isn't a fixed rule for ground rods. If you are in dry sand, a 6 ft copper rod isn't long enough. In clay, you might be ok with 3 ft.

The only time your jack stand baseplate will work is on saturated turf after a good rain shower.
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Old 06-13-2007, 10:23 AM   #22
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If you are wearing shoes when you step into and out of the trailer everything is floating. You are fine. You can ground it, and if you do, do so at the generator. The trailer should be ground to the trailer. The three prong plug will be fine.
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Old 06-14-2007, 11:04 AM   #23
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FWIW, the (2005) owner's manual that came with my manufactured-in-2006 Yamaha EF2400iS states, "make sure to ground (earth) the generator" in both the safety information and the pre-operation checks sections.

This manual also provides guidance on the ground lead sizing (0.12mm/ampere), amonst the eight mentions of "ground" throughout the 38-page document.

I should think there must be something to this notion of grounding the generator...

Examining the wiring schematic, the ground terminal is a straight chassis connection.

Cheers,
-jd.
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Old 06-19-2007, 04:59 PM   #24
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Grounded

Use that gen ground post: Pound a large metal spike in the ground and be on the safe-side!!!!
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