I need some help here from some of you electrical Gurus’ on this one.
I realize this is far from an HI Sop, but I deal with this everyday.
The question; An existing building built in 1984, steel frame and wood exterior with brick. Added on 8,000 s.q. ft. in 1996.
I added on 8000 more sq. ft. but mechanically bonded by building steel.
New 2,000 amp service added and bonded to the steel structure. All is fine.
Right now, adding another wing, 10,000 sq. ft. with complete isolation from the other building with expansion joints.
The power for the new addition for three 100 amp panels is being fed from the existing building 2,000 amp service.
The new building is not bonded with the rest of the building steel of the existing.
Is this right?
The Electrical Engineer is saying not a problem.
The electrical foreman’s gut feeling that I asked, said it should be bonded steel to steel to mate all the structures together. I feel the same way.
One jumper cadwelded column to column 12" apart will bond the whole complex together back to the Main SwitchGear.
What do you experts believe or think is the right way?
Appreciate any input.
Thanks in advance.