Water Heater Manifold Bonding

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A/A Fuel GTX

A/A Fuel GTX

Senior Member
Location
WI & AZ
Occupation
Electrician
Plumbers often transition from PEX to copper to make their water heater connections. Of course the water heater is connected to the EGC. Is it really necessary to run a #4 ( 200A service ), from the panel or GES to the copper manifold? Would dielectric fittings change anything in this scenario?
 
A/A Fuel GTX said:
Plumbers often transition from PEX to copper to make their water heater connections. Of course the water heater is connected to the EGC. Is it really necessary to run a #4 ( 200A service ), from the panel or GES to the copper manifold? Would dielectric fittings change anything in this scenario?
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It is not necessary to bond the copper since it is not a complete piping system.

At what point does one consider the piping to be copper? Good question. Around here it is more than 50% of the plumbing must be in copper to demand bonding.
 
A/A Fuel GTX said:
I agree and as a kicker, it is not likely to become energized.
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Well if there is power going to the unit then there is a potential that it could get energized. Hopefully the EGC will take care of that. :smile:
 
A/A Fuel GTX said:
I agree and as a kicker, it is not likely to become energized.
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Sorry, I should have been more specific. With dielectric unions, the copper is not likely to become energized.....:cool: . Without, yes, the EGC would do its job.
 
Dennis Alwon said:
Well if there is power going to the unit then there is a potential that it could get energized. Hopefully the EGC will take care of that. :smile:
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It "could" become energized but is it "Likely" to become energized? :wink:
 
This is a great thread ,.. and Mike Whitt makes a very convincing argument .. it is long ,..sometimes confusing,... but one of the greats .. he has obviously thought ,. researched and debated this subject ,...to near death!!

My answer to the O.P. is NO. there is no need to run a #4 to bond this section of piping manifold. There is no requirement to make water pipes electrically continuous
 
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