680.26

[fireryan]

Im installing a outdoor hot tub that will be sitting on a concrete slab. The slab has wire mesh instead or rebar. In reading 680.26 b(2)(B)1 is wire mesh considered reinforcing steel or do I need to run the #8 around the perimeter like they discuss in alternate means.

 

[Twoskinsoneman]

is wire mesh considered reinforcing steel

I say yes.

 

[fireryan]

After doing some further reading i agree. what sort of connection could you use to connect to the wire mesh?

 

[volt101]

Tie the 8awg with a readily available and approved clamp to a little chunk of rebar that is tied to the mesh.

 

[fireryan]

Tie the 8awg with a readily available and approved clamp to a little chunk of rebar that is tied to the mesh.

there you go. Thanks

 

[George Stolz]

Worth noting that in the 2011, bonding the slab is no longer required.

 

[raider1]

Worth noting that in the 2011, bonding the slab is no longer required.

Keep in mind that this is a TIA to the 2011 NEC. As written the 2011 NEC does require an equipotential bonding grid around an outdoor hot tub.

 

[Dennis Alwon]

Keep in mind that this is a TIA to the 2011 NEC. As written the 2011 NEC does require an equipotential bonding grid around an outdoor hot tub.

Yes but that TIA is for 2011 and some areas like NC who have not adopted the 2011 still requires it in spite of the change.

 

[pete m.]

Yes but that TIA is for 2011 and some areas like NC who have not adopted the 2011 still requires it in spite of the change.

At least here in Ohio the TIA will only be usable if it is adopted in addition to the 2011 NEC.

Pete

 

[fireryan]

Worth noting that in the 2011, bonding the slab is no longer required.

whats the reasoning for no longer bonding the slab?

 

[John120/240]

I will take a guess,rather than assume; It might be after further research that

the benifit of bonding the slab did not provide any added protection.

Would some more knowledgeable minds chime in.

 

[George Stolz]

There was a proposal to make it happen that was rejected. A comment was made that made a big stir among the CMP, and a task group was created to investigate and see if there had ever been any reported cases of shock from lack of a bonding grid around a hot tub. Beyond that, I don't know.

I'd recommend you read the ROP and ROC for this change (proposal 17-203), it's good reading.

 

[shortcircuit2]

whats the reasoning for no longer bonding the slab?

I believe it was due to politics and money...

 

[hurk27]

I believe it was due to politics and money...

No codes are added due to politics and money, codes are taken away because someone fights to keep our rights to not pad our world more then it is needed.

 

[shortcircuit2]

The "someone" who fought to get this TIA passed was the Hot-Tub industry...so they could save their buyers "money" on the installation of their tubs.

To many customers, installers, etc. were unhappy with the cost and mess of cutting up their concrete patios to install the perimeter bond.

So I see it as politics and money.