Boat dock/piers for single family dwellings

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relochris

relochris

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North Carolina
I'm wiring my first floating dock. I plan on installing a 60amp GFCI sub panel near the dock. The questions I have are:
1. Do I need to drive a ground rod for this panel as it will be a good distance from the house or will the equipment bonding take care of it.
2. What method of strain relief can be utilized to take into account the rise and fall of the water.

I'm wiring for a 30amp boat lift and an assortment of lighting. I plan on using liquid tight from the panel to the equipment. I just can't figure out the strain relief to get from underground (or water) to the equipment. I would greatly appreciate any help.
Thanks
Chris
Christopher's Electrical Service NC
 
Can't help you with the strain relief, but any "structure" fed with a "feeder" (as opposed to a branch circuit) requires a grounding electrode. See 250.32(A).
 
Thanks haskindm. That's what I thought. I remember in MA when they started making us drive a sigle ground rod for remote main panelboards. I'm still stumped on the strain relief. section 555 is not for single family dwellings and the other sections don't seem to address this problem. I'm thinking of leaving a coil in the flex under the dock but I'm a little unsure.
 
I've never seen a floating dock that had power to it. Please post pics when you are done. (is this a lake or a tidal body ?)
 
Hey Cavie. 682 was the article that led me to 555. I'm going to call the pier people and see what they usually see. My main concern is that the flex has room to move without just hanging there. Thanks
 
With the Art. 555 That part i do understand that but it stated that if used on single family resdential location then the 555 do not apply. [ this is based on 05 NEC ]

Myself i am not sure if this is confirmed that still carry over to the 08 code and expand fully in resdentail area.

Therefore if someone have answer please let us know because i been going back and forth on 555 and 552 sections.


Merci,Marc
 
I did a floating dock a long time ago and the design of the dock had a wireway built into the center of the dock with a removeable cover. The dock sections were hinged and we used some sort of sow cable to supply each dock space.
 
Great link MD. I wish this dock had a wireway. I'm confident about the code on this, I'll just have to do the best I can on the install and hope the inspector and I are on the same page. This is a great learning experience for me. After all the time I've put in figuring it out I'll have to start advertising "specializing in dock/pier wiring". I appreciate all of the advice.
 
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