UF Cable to Dock has Fault

[brian john]

I dont believe you should meg a 600V cable at 1000V.

~Matt

Standard test voltage for 600 VAC cable is 1000 VDC.

 

[Rewire]

Today I found two circuits feeding the dock. The panel that feeds the circuits is over 100 feet away.

One 20 amp cb is dedicated to one duplex gfi receptacle at the dock. The gfi was tripped. It had two LV lighting transformers plugged in under an in-use cover. The only line voltage down stream of the gfi was inside the receptacle box, the short cords to the transformers and some minimal line voltage controls for the lighting within the transformer enclosure and the primary of the transformer. I reset the gfi receptacle and the lights came on. I'm wondering what could have tripped the gfi. I'm assumming everything on the low side of the transf will not affect the gfi. Maybe it is the splices in his cords but they were taped up pretty good.

The other circuit is fed by a 20 amp gfi circuit breaker. Because it feeds the end of the dock it is more like 200 feet long. It runs directly to a 30 amp 3R disconnect. The disconnect feeds a switch to a flood light and a 30 amp 125 volt twist lock receptacle. I assume to plug in a boat. The gfi cb was tripped. The green wire was cut and not connected to anything. All the metal enclosures were ungrounded! Of course I'll reconnect the ground wire and meg the wires to see if the feed to the dock is bad. I'm wondering why this particular feed even has gfi protection. Does it need it? If it does I could put a gfi receptacle just before the disconnect and eliminate false tripping??

Our AHJ at Lake Ozark requires 30 Amp marine power receptacles to be GFI protected. I usually place a GFI breaker in the disconnect at the sea wall.

 

[Article 90.1]

I get the distinct feeling this question should be in the FAQs.

...Or at least in a sub-forum other than "Electrical Contracting and Estimating/Management"

 

[mkgrady]

...Or at least in a sub-forum other than "Electrical Contracting and Estimating/Management"

Which category would be more appropriate?

 

[Article 90.1]

I'm not a moderator, so I'll let one of them answer. Perhaps I was picking on this post a bit, but it is frustrating that this folder is for posts about the business of electrical contracting, etc. and it is full of troubleshooting posts, and other topics not germane to the folders label.

After taking a minute to look back at the choices, perhaps you mede the best decision, and perhaps there ought to be a folder for "Troubleshooting, oops, or otherwise.

Anyway, were drifting off the original topic a bit, so who am I to judge?

 

[Rewire]

I'm not a moderator, so I'll let one of them answer. Perhaps I was picking on this post a bit, but it is frustrating that this folder is for posts about the business of electrical contracting, etc. and it is full of troubleshooting posts, and other topics not germane to the folders label.

After taking a minute to look back at the choices, perhaps you mede the best decision, and perhaps there ought to be a folder for "Troubleshooting, oops, or otherwise.

Anyway, were drifting off the original topic a bit, so who am I to judge?

well one can only post so many "what would you charge " posts before everyone would be complaining. I like the fact that two of the posts were about equipent that could be of use in finding faults.As an "Electrical Contractor" I find this type of information very useful.

 

[480sparky]

Which category would be more appropriate?

I was simply pointing out the OP question seems to have been asked several times in the past few weeks.

 

[Rewire]

I was simply pointing out the OP question seems to have been asked several times in the past few weeks.

I think it has to do with Global warming