International Residential Code

[rwacheson]

I do bonding/grounding training for CATV folks, and in a recent class, I was told of cities in the US who build single family/duplex homes not to the NEC, but to the International Residential Code, and installers were having a difficult time finding a permissible bond wire attachment point.

Can anyone give me a little backround and point me where I might go to find out more? The 2008 NEC has the "Intersystem Bonding Connection" and other places to bond, but the IRC?

One thing about doing classes, you always, always, learn something.

Many thanks.

 

[bphgravity]

See Section E3609.3 - 2009 IRC...

E3609.3 Bonding for other systems. An intersystem bonding termination for connecting intersystem bonding and grounding conductors required for other systems shall be provided external to enclosures at the service equipment and at the disconnecting means for any additional buildings or structures. The intersystem bonding termination shall be accessible for connection and inspection. The intersystem bonding termination shall have the capacity for connection of not less than three intersystem bonding conductors. The intersystem bonding termination device shall not interfere with the opening of a service or metering equipment enclosure. The intersystem bonding termination shall be one of the following:


1. A set of terminals securely mounted to the meter enclosure and electrically connected to the meter enclosure. The terminals shall be listed as grounding and bonding equipment.

2. A bonding bar near the service equipment enclosure, meter enclosure, or raceway for service conductors. The bonding bar shall be connected with a minimum 6 AWG copper conductor to an equipment grounding conductor(s) in the service equipment enclosure, to a meter enclosure, or to an exposed nonflexible metallic raceway.

3. A bonding bar near the grounding electrode conductor. The bonding bar shall be connected to the grounding electrode conductor with a minimum 6 AWG copper conductor.

 

[LarryFine]

I'm surprised a direct connection to an electrode isn't permitted, or even a splice onto a GEC.