I’m designing to install new 100kva 480V-120/208V transformer and distribution panel and it will be installed on the concrete deck. I was thinking to have ground rod but I found out that I cannot creat ground from concrete pad. What is practical way to provide ground in this situation?
Transformer GEC at Marina
- Thread starter PowerdT
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petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
Is there no earth under the concrete deck? Normally you could drill a hole through the pad and pound a 10 foot long rod into the earth through the hole. Incidentally, you will probably need two rods, 6 feet apart.
Otherwise you will have to run a wire to wherever you can find dirt to pound the rods.
ggunn
PE (Electrical), NABCEP certified
- Location
- Austin, TX, USA
- Occupation
- Consulting Electrical Engineer - Photovoltaic Systems
Or a bucket of dirt.
9gag.com
Boss: Did you ground the support? Randomworker: Yeah boss... The grounded support.... - WTF
167 points • 16 comments
the marina is human made concrete deck, no concrete gravel there
Haha that’s funn.Or a bucket of dirt.
Boss: Did you ground the support? Randomworker: Yeah boss... The grounded support.... - WTF
167 points • 16 comments
xformer
Senior Member
- Location
- Dallas, Tx
- Occupation
- Master Electrician
Ground Ring around the lake? 
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
The GEC can be ran back to the grounding electrode(s) at the shoreline, unless this concrete slab is an island.
I will verify about the ground ringGround Ring around the lake?
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