What is a Residual current device or RCD?
An RCD is a residual current device. It is a safety device that is used in electrical installations to protect against the risks of electrocution and fire. RCDs are designed to break the circuit if they detect an imbalance between the live and neutral wires. This can happen if there is an earth fault in the electrical installation or if someone comes into contact with a live wire. RCDs can save lives by preventing electrocutions and electrical fires.
Do I need to have an RCD?
Most domestic consumer units will have an RCD fitted as standard. RCDs are designed to protect against electrical shocks and fires by quickly disconnecting the power if there is a fault. If your consumer unit does not have an RCD, it is worth considering having one fitted.
Are RCDs expensive to fit?
An RCD is a life-saving device that is fitted to your electrical circuits. They are not expensive to install, and could potentially save your life.
Are RCDs required for a satisfactory EICR
The requirements of BS7671 for the provision of an RCD not exceeding 30mA are as follows
It is required that an RCD is provided for all socket outlets of rating 32A or less
It is a requirement that an RCD is provided for the supply of mobile equipment not exceeding 32 A for use outdoors
It is required that cables have RCD protection if they are buried in walls to a depth of less than 50mm
If a wall or partition contains metal parts then it is required that cables buried in this wall have RCD protection regardless of the depth
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