Code class this weekend..

[electricmanscott]

I'll be taking a mandatory 15 hour class this weekend on the 2008 code changes. How many boxes of tissue should I bring for when TR receptacles and AFCI's are covered? :-?

Assume 55-75 people in your calculation.



This ought to be fun. :grin:

 

[ptonsparky]

If they are anything like the ones I go to, half won't care even after they leave. If the topic comes up after lunch, another half of those remaining will be napping. Of the 19 or so left only 4 will speak up and you will never change the minds of two of those. One small box is enough.

 

[ryan_618]

I don't get a lot of heartburn over the TR issue when I teach, but I make it a point to show the data that supported the change. I do get a lot of heartache over the AFCI thing, however.
Above all others, I get more negative feedback on the change to 310.15(B)(6), after I show that in many instances a 200A feeder changes from 4/0 aluminimum SE cable to 300 kcmil.

 

[lpelectric]

I'll be taking a mandatory 15 hour class this weekend on the 2008 code changes. How many boxes of tissue should I bring for when TR receptacles and AFCI's are covered? :-?

Assume 55-75 people in your calculation.



This ought to be fun. :grin:

You'll need between 55 and 75 boxes of Kleenex. 15 hours of code changes....15 hours! No Way you can do it with less! When the attendees realize how deep the CMP's and manufacturers are into their pockets, they'll be crying....on second thought...bring 100.

 

[Cavie]

I do CEU's on line to prevent these kind of issues. I get board with all the what if's? ...and I don't think...? and my opinion is.... I am one that does not care how or why a regulation is in the code. I just wish to know what is in the code. When an electrican askes me to explain why I tell him what I know about the issue and inform him that I am not an instructor. I am an inspector. Two different people. The last class I attened was on the Code changes in 2005. We covered less the 1/4 of the book in the class. Too much time spent in arguments and opinions. With all the changes in 2008, I fell sorry for those having to attend.

 

[raider1]

Above all others, I get more negative feedback on the change to 310.15(B)(6), after I show that in many instances a 200A feeder changes from 4/0 aluminimum SE cable to 300 kcmil.

I agree, that change coupled with the change in 338.10(4)(a) are the changes that I hear from most electricicans that they really dislike.

Chris

 

[celtic]

Above all others, I get more negative feedback on the change to 310.15(B)(6), after I show that in many instances a 200A feeder changes from 4/0 aluminimum SE cable to 300 kcmil.

I'm not seeing the change (other than the column layout ~ amp is 1st) , although I see the '08 T310.15(B)(6) has a bar.

 

[al hildenbrand]

Celtic,

2008 NEC
310.15(B)(6) 120/240-Volt, 3-Wire, Single_Phase Dwelling Services and Feeders.

For individual dwelling units of one-family, two-family, and multifamily dwellings, conductors, as listed in Table 310.15(B)(6), shall be permitted as 120/240-volt, 3-wire, single-phase service-entrance conductors, service-lateral conductors, and feeder conductors that serve as the main power feeder to each dwelling unit and are installed in raceway or cabel with or without an equipment grounding conductor. For application of this section, the main power feeder shall be the feeder between the main disconnect and the panelboard that supplies, either by branch circuits or by feeders, or both, all loads that are part or associated with the dwelling unit. The feeder. . .

The key turn of phrase is red.

Any subpanel off the dwelling main panel can no longer use T310.15(B)(6).

 

[al hildenbrand]

Saying it another way: "The only feeder allowed to have its supply conductors sized to Table 310.15(B)(6) are feeder conductors that supply a single panelboard carrying 100% of the dwelling unit's diversified load." ?MWES

 

[celtic]

For application of this section, the main power feeder shall be the feeder between the main disconnect and the panelboard that supplies, either by branch circuits or by feeders, or both, all loads that are part or associated with the dwelling unit.

...as opposed to

For application of this section, the main power feeder shall be the feeder(s) between the main disconnect and the lighting and appliance branchcircuit panelboards(s).

Thanks for the hand holding there Al.


*******

In Ryans post:

Above all others, I get more negative feedback on the change to 310.15(B)(6), after I show that in many instances a 200A feeder changes from 4/0 aluminimum SE cable to 300 kcmil.

Looks like a big change to T310.16 !

 

[celtic]

?MWES

What is MWES?

 

[al hildenbrand]

What is MWES?

Midwestern Electrical Seminars. The language in their continuing ed handout was too good to paraphrase.


Edit - typo

 

[al hildenbrand]

Thanks . . .

You're most welcome.

 

[electricman2]

I agree, that change coupled with the change in 338.10(4)(a) are the changes that I hear from most electricicans that they really dislike.

Chris

Agreed. That 50A electric heat strip circuit is now going to be 4AL SE instead of 6.