Do water pipes need to be earthed?
As long as the Water pipe, Gas pipe or Oil pipe, coming into your property are metallic, Main Bonding is compulsory in all circumstances even when the rest of the pipes in your house are plastic.
What is the BS number for bonding clamps?
BS 951
BS 951 specifies the performance and important mechanical requirements for metal clamps that are used to provide mechanically and electrically sound earthing and bonding connections to metal tubes.
What size should earth bonding be?
2. The main protective bonding conductors shall have a cross-sectional area of not less than half that required for the earthing conductor and not less than 6mm².
Is earth bonding a legal requirement?
As of 2008, earth bonding is a legal requirement for any electrical installations in rooms that contain a shower or bath. The term ‘earth bonding’ refers to the use of a thick green and yellow copper cable to connect your gas meter or consumer unit to incoming supplies such as your gas pipe.
Is earth bonding still required?
Supplementary equipotential bonding (between waste pipes, metallic service pipes and earth connections of bathroom equipment) is no longer required if, and only if, the main bonding between metal service pipes can be proved to be continuous.
What is the difference between bonding and earthing?
Earthing draws the unwanted energy to the ground to protect the person who touches the metallic body of the machine during faults. Bonding ensures both the connected devices at the same level of voltage and provides a low impedance path back to the source to trip the CB in case of fault currents.
What size does earth bonding need to be?
How do you bond water pipes?
Where hot and cold water pipes are electrically connected, you need only one bonding jumper — to either the cold- or hot-water pipe. Otherwise, use a single bonding jumper sized per 250.104(A)(1) to bond the hot- and cold-water piping together. Building or structure supplied by a feeder.
What is the scope of BS 951 clamps?
The scope of BS 951: 2009 states that the clamps are primarily intended for use in electrical installations for: connecting earthing conductors having a cross-sectional area in the range 2.5 mm2 to 70 mm2 to earth electrode rods or other means of earthing
How many screws does an Earth clamp have?
Traditionally, earth clamps of this type have a single M5 screw and a 16mm penny washer for terminating the bonding conductor, but the ones I received had a bar type of clamp secured with two screws.
What is the Max conductor size of the Earth clamp?
BS951 10mm max conductor size. This earth clamp is suited for both dry and wet conditions and will fit a range of pipe dimensions.
What is the difference between E14 and E16 clamp?
E16 clamps are for dry, damp or corrosive conditions and are often coloured green. The E16 clamps allow for a larger conductor (usually 16mm² or greater) to be connected than for E14 and E15 clamps.