Hi
customer had installed a 10m awning that is secured to a very substantial 6” box steel frame, concreted in either end - large goal post if you will. It is fitted on the garden patio, just outside the entrence to his living area accesd by sliding doors. The motor is a low current single phase motor that moves the awning in and out quite slowly. There is no fortuitous or deliberate connection to earth between the motor CPC and the aluminium awning box. A 3 core flex is run on top of the steel work into and RCD socket. I am looking at upgrading the MCB to RCBO. I have no details yet from the manufacturer - i will look to getting these. It is a TNCS supply.
Question is, should i bond the steel work to the motor CPC at lesst? Technically it could be classed as structural. If so it would need a much bigger conductor... Or do i just leave it alone? My call is that this is extranious and should be bonded to the supply of the motor. It is on the threshold between EP zone and simultaneously accessible for both. He wont go for 10mm cable back to dis board, pretty sure he will go ape with a bit of 4mm on show... ?
customer had installed a 10m awning that is secured to a very substantial 6” box steel frame, concreted in either end - large goal post if you will. It is fitted on the garden patio, just outside the entrence to his living area accesd by sliding doors. The motor is a low current single phase motor that moves the awning in and out quite slowly. There is no fortuitous or deliberate connection to earth between the motor CPC and the aluminium awning box. A 3 core flex is run on top of the steel work into and RCD socket. I am looking at upgrading the MCB to RCBO. I have no details yet from the manufacturer - i will look to getting these. It is a TNCS supply.
Question is, should i bond the steel work to the motor CPC at lesst? Technically it could be classed as structural. If so it would need a much bigger conductor... Or do i just leave it alone? My call is that this is extranious and should be bonded to the supply of the motor. It is on the threshold between EP zone and simultaneously accessible for both. He wont go for 10mm cable back to dis board, pretty sure he will go ape with a bit of 4mm on show... ?
![[ElectriciansForums.net] Steel Awning frame outside EP zone, bondit?](https://electricians.s3.eu-west-1.amazonaws.com/data/attachments/58/58194-f2ed034b458f42bb49ff3f36f6aaa5b4.jpg)
