Undersizing engineer designated wire

Pinnie

Senior Member
Location
Ohio
Occupation
Commercial Electrician
If an engineer calls for #4 for a 60 amp piece of equipment, can I the electrician size the wire, per the NEC, if the engineer oversized to cover their bases.
 
If engineered plans are provided you have to follow them. You can always ask the engineer to change the plans
How is the process to ask them to change something? I’ve never dealt directly with an electrical engineer. I won’t for this but I’m just curious.
 
Someone hired the engineer to do the design and paid him to do that. Then the job is bid/quoted based on that design. Unless it has some outrageous mistake why would you want the risk/liability of changing it?
 
I’m not trying to be immoral, I was just checking the ampacity of the conductors and noticed they were all sized to the 60C. If your terminations are all 75C then that’s overkill.
 
It would be for the company I work for.
If your company agreed to follow the plans provided for a price its not up to your company to make changes to save money. If I was the customer and you made a change like this I would be asking for a credit or require it be changed to to what the plan shows.
 
Many jurisdictions inspect based on the code not the drawings. Some may ask for a revised drawing if they actually compare what's installed to what was in the design. Many of our contracts have a value engineering clause where the guys paying the bills wants suggestions as to how to save money.
 
If your company agreed to follow the plans provided for a price its not up to your company to make changes to save money. If I was the customer and you made changed like this I would be asking for a credit or require it be changed to to what the plan shows.
I do not disagree. On the other hand say you bid a job all in emt then run mc for jumpers here and there should you keep track and reimburse the customer the difference? I’ve never bid a job so I’m not sure of the nuances.
 
Many jurisdictions inspect based on the code not the drawings. Some may ask for a revised drawing if they actually compare what's installed to what was in the design.
That’s good to know
Many of our contracts have a value engineering clause where the guys paying the bills wants suggestions as to how to save money.
Can you elaborate on this?
 
If I was the customer and you made a change like this I would be asking for a credit or require it be changed to to what the plan shows.
I mean you could take that philosophy to the extremes. If you bid time and material and then ANY difference in time or material price you should come back to the customer and reimburse them based on that logic. And conversely charge them what went over on time and material. Realistically no one is doing that. Just because it’s conductors and it’s more important they are sized correctly doesn’t make it any different from that line of logic.
 
Can you elaborate on this?
The client hires a design company including engineers. Often they over design and the clients only want the minimum allowed by code to keep costs down. We'll VE the project by reviewing the design and making suggestions to save money.
 
As an engineer, I would recommend that you submit an RFI through the proper channels for the engineer to review and provide directive.
 
As an engineer, I would recommend that you submit an RFI through the proper channels for the engineer to review and provide directive.
Of course. The liability issue is not worth the minor savings. Just install the conductors per the drawings.
 
I would add... if you see a clear violation or something dangerous, bring it to attention.
honestly at the company work for each individual electrician has their own standard when it comes to code compliance and installation integrity (not that I agree it just is the truth). A lot of guys just want to look good for the boss and save money to look good on paper. Not a very well oiled machine to be frank. But yes obviously I wouldn’t allow a violation of any kind regardless of how far up the chain it goes.
 
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