Safety Tips at RPS Electrical Services
Where to find them
You will find Miniature Circuit Breakers (MCBs) and fuses in your distribution board. They protect the individual circuits that carry electricity to the various applications in your home, such as lights, sockets, immersion heater and cooker. Fuses used in domestic fuse boards are usually one of two types: NDZ fuses and DZ fuses, NDZ fuses are narrower than DZ fuses and are often found in older installations.
How distribution boards work
If there is a fault in the circuit or if an appliance causes an overload, the MCB will trip or the fuse will blow and all current will be cut off to that circuit. An MCB can be reset by returning it to the 'ON' position. If a fuse blows, it must be replaced with one of similar strength.
Fuses have a small coloured disc in the base that identifies the strength:
Disc colour, Strength, Used for
Green : 6 amp: Lights
Red: 10 amp: Lights
Brown: 16 amp: Socket outlets - radial
Blue: 20 amp: Water heater, storage heater, socket outlets - ring
Black: 35 amp: Cooker, electric shower
Residual Current Devices (RCDs)
RCDs protect you against serious electric shock if there is an electrical fault in your home. They detect 'leaking' electricity from a circuit (e.g. a damaged cable) and respond by disconnecting the electricity supply from the circuit. Most modern homes have an RCD fitted in their distribution/ fuse board, but older homes may need to install one. RCDs are also available to fit at a socket outlet. These should be used for tools and outdoor equipment. You should check that your RCD is working correctly by pressing the test button marked 'T' or 'Test'.
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RPS Electrical is known for its high-quality electrical services for very affordable prices. We have provided great electrical services to the people of Dublin, and have earned their respect and trust. It is for these reasons that Electrician Dublin are the leading domestic electricians in all Dublin
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