Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, about the use of structural steel as extraneous conductive parts, is answered by SELECT:
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| Can structural steel can be bonded to earthing protection? |
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Question: Does structural steel require to be bonded to earth as per British Standards and BS 7430?
Answer: Clause 21.4 contained in BS 7430:1998 provides guidance on typical main equipotential bonding, and includes recommendations where earthed equipotential bonding and automatic disconnection of supply (EEBADOS - now referred to as Automatic Disconnection of Supply in BS 7671:2008) is used as the protective measure and recommends that extraneous conductive parts such as main water pipes, main gas pipes, and exposed metallic parts of the building structure are bonded to the main earthing terminal.
This is similar to requirements contained in BS 7671:2008 specifically in regulation 411.3.1.2, which requires main bonding conductors to connect to the main earthing terminal extraneous conductive parts - including water installation pipes, gas installation pipes and exposed metallic structural parts of the building.
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