pulsar69
Member
- Location
- United States
Went into the attic this afternoon and found a comprehensive course I had ordered from Mike in 1999, cost $
1050 On VCR , can you tell specifically which Mike Holt publication you got the picture from.
General requirements 110.26
- Thread starter pulsar69
- Start date
1050 On VCR , can you tell specifically which Mike Holt publication you got the picture from.
pulsar69
Member
- Location
- United States
Dean Austin, senior electrical content specialist at NFPA
Christopher Coache..senior electrical engineer at NFPA
Corey Hannahs..senior electrical content specialist at NFPA
Erik Hohengasser..electrical technical lead at NFPA
Jeff Sargent..principal electrical specialist at NFPA
these men have over 100yrs. In the trade. 3 of them are masters, so their opinion means something.The handbook contains the complete regular code with their OPINIONS, with illustrations, and the regular code book has a disclaimer in the front of the book very similar to the one in the handbook, so I don't understand why you're trying to knock down the handbook?
I don't have a need to know what publication it came from, the date tells me what code cycle it pertains to. Until a few years ago his illustrations were available under "free stuff".
pipe_bender
Senior Member
- Location
- Boston
- Occupation
- Electrician
I am curious how much does it cost on average for a EE to calculate that incident energy per panel?
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
If you want a complete detailed report for one panel, I would likely be at $500.
If you want 2 panels, I would likely be around $500.
The problem is startup costs. Kind of like your cost for a receptacle when you start from your shop, versus when you are already on site
But just like electricians, you can find someone willing to do it for just some really cheap price, but remember; You don't get what you don't pay for.
- Location
- Illinois
- Occupation
- retired electrician
No idea, but very likely that a place that has equipment that would have an incident energy of 40 cal would already being doing the 70E labels for all of their equipment.
If they have their own software and are adding to an existing system, where the drawings and short circuit information is up to date, would not take very much to add an additional item. If there is no up to date information, it would likely cost tens of thousands of dollars to get all of the needed information to input into the software that will calculate the values.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Most 208Y/120V services entrance equipment 600A and above are often in the 40 cal range
High incident energy is usually the result of relatively low fault currents, say <22kA, that take a long time to clear, such as when waiting for the POCO protection to operate.
- Location
- Illinois
- Occupation
- retired electrician
Good point.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
I think the handbook is a very good publication. But as I said it is not and it says it is not intended to be any sort of formal interpretation from NFPA. It is no more or no less better than say Mike Holt's published materials or several others out there that are nationally known electrical/code educators.
NFPA 70 itself is very frequently adopted as the law in many places. The hand book is not.
Pretty sure the handbook does not go through the same sort of process to update it as the code itself does. NO public inputs, no public comments, just let the new edition of NEC get written and a group of people make updates to corresponding handbook using what they know and likely do consider content of the PI's and comments that were made making the new code in what they end up publishing. But is all done basically within that group of people and not the same manner as how the code itself is done. And they do this somewhat quietly unnoticed yet the handbook comes out basically about the same time the new code comes out.
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