Torque Applied to Bus Bars and Bolts

You could always ask him what torque is required. Also, the manufacturer probably has some info on that.

thank you my friend , this is more than enough

Excellent link!

Tighten bolt until it breaks. Back off one-quarter turn.

Good Answer!!

Only one answer, ask the manufacturer, it is the only one who can give figures without being questionned, otherwise you are going to lengthy meeting and discussions.

Galvanized bolts on copper bus?

Both the bolts and their torque requirements should have come with the equipment, but the manufacturer should have the information.

Create a commission sheet and note when (date) and by who each bolt was torqued properly, have a second representative sign off to verify that it was done correctly. I usually instructed the crew that after each bolt was torqued the person doing the install, mark each bolt with a Sharpie and initial and date each bolt.

Have the consultant give you his requirements. His requirements are all thet matters. Whatever specs you find will be meaningless if he does not agree that they are correct. -- JHF

I would also have the manufacturer's specifications handy and compare them to the consultant's advise. It is always a good idea to do a sanity check on single source advice. The torque will vary with the yield strength of the copper bus bars and the type and size of the bolts/nuts/washers. It may also be a good idea to use a recently calibrated/certified torque wrench to be certain that the technician is not using one that has been dropped on its head one or two too many times.

No body needs bus problems!

Have FUN!
TT3

Agreed! Good answer. -- JHF

No consultant or engineer has the right to override the engineering requirements of the equipment manufacturer as it would void the warranty and liability of the manufacturer.

That is kind of what I thought. That is why I advised that he check with the manufacturer of the buss bars also. If the consultant is telling you to do something significantly different than the manufacturer of the product is telling you, he had better have a damn good explanation for the deviation!

He may have a very good reason for the difference but you will never know until you ask. If he isn't willing to explain why he wants it done differently than the manufacturer's spec. I would start looking for another consultant yesterday!

Have FUN!
TT3