A guide on earthing and bonding including an explanation of what they are, why. The types of bonding generally used are main bonding and supplementary . Having seen plenty of main earth bonding (or lack of) in recent months I have a query that needs a little clarification. I often seen the main earth . Electricians Forum – Talk.
Earth bonding via sub- main ? Protective equipotential bonding is a provision under the requirements for fault protection for. In each electrical installation, main equipotential bonding conductors ( earthing wires) are required to connect to the main earthing terminal for the installation of. Main earth and bonding csa? How to install main protective bonding to the main incoming metal water and gas supply pipes.
Should be connected to the main earth terminal of the electrical installation. Tables to calculate the most appropriate size earth bonding cable for your application. What methods are used to earth the screen or shield and why?
The purpose of the protective conductors is to provide a path for earth fault current. The minimum size of bonding conductors is related to the size of the main. In each installation main protective bonding conductors shall connect to the main earth terminal.
These should connect to 1) water installation . We have seen earlier in this chapter that when an earth fault takes place in. There are two aspects to equipotential bonding : the main bonding. Bonding WHAT IS EARTH BONDING ? All metal meter enclosures must be bonded to earth with a bonding conductor not less . Its main function is to reduce to a minimum the risks of fire and shock hazard.
This basic guide covers the main earth at the consumer unit as well as main bonding of metal service pipes and supplementary bonding of metal items such as . If the main earth or bond connection has to be disconnecte the bridging . There is no specific requirement to carry out supplementary bonding in domestic kitchens, washrooms. A supplementary bond is not run back to the main earth. Hi, I recently had a contractor install earth bonding for my water and gas mains. I understand that 10mm should be use except for the main. Supplementary information on earth electrodes are also included.
The chapter discusses main protective equipotential bonding.
A protective conductor that connects the main earthing terminal or bar to the earth electrode. Links water and gas pipes, central heating etc. See also my section on domestic . Fault currents in the main bonding conductors cross- sectional area required for the earthing conductor with a maximum of 25mm copper . This is the last route out of a house, for the current, in the event of an earth fault. This is sometimes wrongly called the “ main earth ” or even “ main bonding ”.