THHN Direct Buried

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Dennis Alwon said:
What code section is that? :D
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This local one.
250.64(B). Revise this section as follows:
250.64(B) Securing and Protection Against Physical Damage. Where exposed, a grounding electrode conductor or its enclosure shall be securely fastened to the surface on which it is carried. A 4 AWG or larger copper or aluminum grounding electrode conductor shall be protected where exposed to physical damage. A 6 AWG grounding electrode conductor that is free from exposure to physical damage shall be permitted to be run along the surface of the building construction without metal covering or protection where it is securely fastened to the construction; otherwise, it shall be in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, electrical metallic tubing, or cable armor. Grounding electrode conductors smaller than 6 AWG shall be in rigid metal conduit, intermediate metal conduit, rigid nonmetallic conduit, electrical metallic tubing, or cable armor. Exposed grounding electrode conductors or cable armor shall not be installed on the outside of a building or structure. 6 AWG or smaller grounding electrode conductors shall not be installed exposed below 5'.
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Bold is in the code....
 
Cavie said:
Sprinkler must be bonded. "Metal water pipeing system" It doesent matter what the water is being used for.
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Cavie my previous post said as much but you cannot use it as a grounding electrode. My first statement was not clear.

e57 said:
This local one.
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I was joking about the junkie theft. :smile:
However I see you were serious- thought you were joking.
 
If you don't bond it to the water system you will have a difference of potential between the pieces of steel to which the person connecting them gets shocked.


Heres question for you guys,
Do you Or should you bond from your water pipes to cast iron sewer pipes in basement?
 
RJohnsonMasterElectrician said:
If you don't bond it to the water system you will have a difference of potential between the pieces of steel to which the person connecting them gets shocked.


Heres question for you guys,
Do you Or should you bond from your water pipes to cast iron sewer pipes in basement?
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Don't know whether you should but I have never seen anyone bond a cast iron sewer pipe. It is not likely to become energized therefore I see no reason to do it.

In terms of the sprinkler pipe the EGC will bond the pipe thru the pump motor connection.
 
Dennis Alwon said:
I was joking about the junkie theft. :smile:
However I see you were serious- thought you were joking.
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Yes - out of town guys find this one out the hard way when they get nailed by an inspector who feels that it should be that way everywhere. They ask - "Are you joking?" Which sets up a bad tone for the rest of the inspection.... :rolleyes:
 
I have a fiberglass tub with obviously copper water pipeing and Cast iron drain into earth and out to septic tank.
While I was taking a shower one day my foot was on the drain and I reached up and grabbed the shower head and got a little tingle. It didn'y hurt but scared me knowing that isn't supposed to happen. I went and got a digital meter and read 2.3 volts from drain to shower head and shower controls. I went into the basement and for temporary fix wrapped a piece of #12 around the cast iron drain and hooked it into the ground bar of the panel. It (2.3 volts) went away because I made the potential difference zero.
 
Sure, we bond cast iron sewer lines on a routine basis. Usually via the first 1 1/2" galvanized sink drain that we can find. I have found to many homes with small potential differences between them and the water pipes. Home owners don't like the shock even if it is just a couple volts. I make money on selling parts and making people happy.
 
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