Question 1

What are the different cables in my house used for?

Accepted Answer

Analogue phone line = thin round cable, white   TV Aerial and SKY satellite dish = thick round coaxial cable, white or black   Ethernet CAT5 computer connection from modem to wallplate = round 8-wire cable in assorted colours. The 8 wires are arranged into 4 twisted pairs: blue and blue/white, orange and orange/white, green and green/white, brown and brown/white.   Lighting = 3 core flat cable (tru-rip) 1.5mm2 cross-sectional area   Power sockets = 3 core flat cable (tru-rip) 2.5mm2 cross-sectional area

Question 2

What are the advantages and disadvantages of LED lights?

Accepted Answer

LED lights last longer than incandescent lamps, are cooler to touch, and use less power for the same output. Some units are dimmable, and some can be set to Warm White or Cold White. LED lights are physically more robust - they will not break if moved while they are hot.   LED lights are more expensive than incandescent lamps, and some will not respond properly to a dimmer.

Question 3

Can two security sensors be wired in parallel to control the same security lights?

Accepted Answer

Yes. They can cover different areas of your property and turn on the same lights when movement is detected in their zone.

Question 4

Which wires can give me a shock when cut?

Accepted Answer

Only the flat 3-core wires carry 230Vac. Never cut these wires until the power has been disconnected first and any switch/circuit breaker protected from inadvertent switch-on.   Phone, TV, and ethernet cables do not usually carry high voltages. However, if they connect to wires carrying 230V ac during an event like a fire or an earthquake, they could become dangerous if the conductors were touched.

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