2008 Code Changes - Electrician Talk - Professional Electrical Contractors Forum

gilbequick · 10-17-2007, 04:58 PM

OK, for all of you guys out there that have taken some 2008 NEC classes, would you be so kind to enlighten us out here that aren't quite up to speed on the changes. What's changing for the 2008-2010 codes?

Only thing I've heard mention of so far is that in residential everything is going to be arc fault protected. Is this true?

raider1 · 10-17-2007, 07:07 PM

Quote:

Originally Posted by gilbequick

OK, for all of you guys out there that have taken some 2008 NEC classes, would you be so kind to enlighten us out here that aren't quite up to speed on the changes. What's changing for the 2008-2010 codes?

Only thing I've heard mention of so far is that in residential everything is going to be arc fault protected. Is this true?

Yes AFCI on most 120 volt 15 and 20 amp circuits.

Tamper resistant receptacles will be required in dwelling units.

All 120 volt 15 and 20 amp receptacles in garages and basements need to be GFCI protected.

All multiwire branch circuits are required to have a means to disconnect all conductors of the circuit simultaneously.

I will post some later.

Chris

gilbequick · 10-17-2007, 09:18 PM

Wow, tamper resistant receptacles. Sounds like the cost of business is on the upswing.

Quote:

All multiwire branch circuits are required to have a means to disconnect all conductors of the circuit simultaneously.

So the breaker isn't good enough anymore?

raider1 · 10-18-2007, 10:33 AM

Quote:

Originally Posted by gilbequick

Wow, tamper resistant receptacles. Sounds like the cost of business is on the upswing.

So the breaker isn't good enough anymore?

A multiwire branch circuit must have the two or more ungrounded conductors of the circuit disconnected together, such as using a 2 pole breaker or 2 single pole breakers using an identified handle tie.

Chris

gilbequick · 10-18-2007, 07:45 PM

Ok ok, gotcha. Thanks that makes sense.

Any other changes to look out for?

raider1 · 10-19-2007, 10:36 AM

There are a lot of changes.

Here are a couple more:

250.94 Bonding for other systems, has been changed to require some specific terminals for intersystem bonding here is what the 2008 NEC says:

Quote:

250.94 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 shall be one of the following:
(1) A set of terminals securely mounted to the meter socket
enclosure and electrically connected to the meter
socket enclosure. The terminals and the enclosure shall
be listed for grounding.
(2) A bonding bar near the service equipment enclosure,
meter socket 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,
meter socket enclosure or 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.

Also 250.8 has been changed to prohibit wood screws, heres what it says:

Quote:

250.8 Connection of Grounding and Bonding Equipment.
(A) Permitted Methods. Grounding conductors and bonding
jumpers shall be connected by one of the following
means:
(1) Listed pressure connectors
(2) Terminal bars
(3) Pressure connectors listed as grounding and bonding
equipment
(4) Exothermic welding process
(5) Machine screw-type fasteners that engage not less than
two threads or are secured with a nut
(6) Thread-forming machine screws that engage not less
than two threads in the enclosure
(7) Connections that are part of a listed assembly
(8) Other listed means

I teach classes on code changes and I have 2, 8 hour classes to cover all the changes to the 2008 NEC.

Chris

rbj · 10-23-2007, 01:18 AM

Quote:

Originally Posted by raider1

There are a lot of changes.

Here are a couple more:

250.94 Bonding for other systems, has been changed to require some specific terminals for intersystem bonding here is what the 2008 NEC says:

Also 250.8 has been changed to prohibit wood screws, heres what it says:

I teach classes on code changes and I have 2, 8 hour classes to cover all the changes to the 2008 NEC.

Chris[/left]
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Good stuff Chris. Anything about shared neutrals for residential? That should be a biggie for the solar guys doing retro and any circuit extensions with AFCI's in the BC.

JohnJ0906 · 10-23-2007, 05:08 AM

Just got my '08 yesterday!

I pre-ordered in May - cost $57 for the spiral including S/H. Thought that was a good price.

Of course, it would have been cheaper if the boss would pay for it.....

raider1 · 10-23-2007, 11:49 AM

Quote:

Originally Posted by JohnJ0906

Just got my '08 yesterday!

I pre-ordered in May - cost $57 for the spiral including S/H. Thought that was a good price.

Of course, it would have been cheaper if the boss would pay for it.....

I got mine for free due to the fact that I teach at the local Tech school.

Chris

JohnJ0906 · 10-23-2007, 04:54 PM

Quote:

Originally Posted by raider1

I got mine for free due to the fact that I teach at the local Tech school.

Chris

Do you teach electricians, or guys just getting in the trade.

I was just wondering about the "tech school"

Pretty cool, either way though.

raider1 · 10-23-2007, 06:37 PM

Quote:

Originally Posted by JohnJ0906

Do you teach electricians, or guys just getting in the trade.

I was just wondering about the "tech school"

Pretty cool, either way though.

I teach the electrical apprenticeship program, as well as continuing education for jouneyman electricians at the local technology college.

Chris

gilbequick · 10-23-2007, 08:57 PM

I've got the 2005 code book. Would it be good enough just to pick up this one: http://www.constructionbook.com/nec-...nec-code-2008/
I'm thinking this would be more helpfull overall. Reccomendations?

Roger123 · 10-23-2007, 09:03 PM

Quote:

Originally Posted by gilbequick

I've got the 2005 code book. Would it be good enough just to pick up this one: http://www.constructionbook.com/nec-...nec-code-2008/
I'm thinking this would be more helpfull overall. Reccomendations?

Seems like you will need two books to carry around if you buy that. The 2008 NEC has all changes in gray highlighted.

Roger123 · 10-23-2007, 09:05 PM

Sorry, duplicate

raider1 · 10-24-2007, 11:05 AM

Quote:

Originally Posted by gilbequick

I've got the 2005 code book. Would it be good enough just to pick up this one: http://www.constructionbook.com/nec-...nec-code-2008/
I'm thinking this would be more helpfull overall. Reccomendations?

The book that you have linked to is a very good book to help you understand the changes to the 2008 NEC, but as Roger pointed out it is not the 2008 NEC. You will still need to buy a 2008 NEC.

Chris