REFURBISHING CONTROL GEAR DOORS

[tulum]

Hello,

We are planning to remove some of our outdated/old controls from the doors of one of our control gear lineups.

To save some time we are make a large plate and mount all of our new controls on this plate. Then we will shutdown and remove all of the old controls and cut a large opening to suit the plate - gasket and install.

My question is that we will be using truss slot stainless steel bolts all around the plate (about 16 @ 3/4")...

Do we have to supply a bonding lug on the plate or is the bonding lug currently on the door good enough to bond the device through the bolts?

Regards,
TULUM

 

[tulum]

Also,

The weather stripping will be in between the plate and the door - making the head of each bolt touch the plate and the nut of each bolt touch the door...

 

[waross]

Hi tulum
How about using one bolt made of cadmium bronze.
The stainless will serve, but one cadmium bronze bolt will remove all arguments and speculation.
respectfully

 

[davidbeach]

To ensure that you don't have any problems, whether in reality or in the minds of any inspectors who may look at it, run a bond wire from the main panel to the door and to the new plate.

 

[jraef]

I would. How difficult can that be? Eliminates the possibility of poor metal-to-metal contact of the bolt heads or nuts, corrosion buildup, paint issues, any thing like that which may occurr in future service work.

Eng-Tips: Help for your job, not for your homework Read faq731-376

 

[jdgardner]

I'm with davidbeach and jraef. A bonding jumper will satisfy everyone.