Can I use 1.5 mm cable for ring main?

It depends. If a fuse spur has been installed and then a supply from that has been taken to your new socket in 1.5 then its fine as the fuse spur will limit the current to 13 amps which 1.5 can handle. If its direct off another socket then it must be 2.5 in normal domestic wiring.

Can you spur off a ring main in 1.5 mm?

no because you will have a 32 amp mcb protecting a 1.5mm2 cable.

Can I use 1.5 mm cable?

In most cases 1mm should be fine but depends on how many lights are on the circuit and how long the cable run is. If quite a few are required or the cable run is over a long distance, then 1.5mm cable should be used to cope with supply demand and voltage drop.

What size cable should be used for a ring final circuit?

Cable Used for a Ring Main or Final Ring Circuit

A ring main uses 2.5mm cable comprising of a live, neutral and earth. This is called two core and earth cable. The 2.5mm is the measurement of the cross sectional area of the cables.

How many sockets can you spur off a ring main?

You can have one unfused spur per socket-outlet on a ring main or one fused spur per socket-outlet, you can have as many sockets as you like off of a fused spur.

Wiring electrical circuits What Cable Size What Mcb size Radial Ring Cooker Shower Lighting Circuit

How many amps can a ring main take?

This being based on the historical design that the cable used for a ring final should have a capacity of at least 0.67 of the circuit OCPD. Therefore if the ring final is to remain as installed, the MCB needs to be down rated to 25 amps if available, or to 20 amps otherwise.

Can you mix 1mm and 1.5 mm cable?

IET Forums - Mixing cable sizes. So it's ok even if I have wired half of the circuit in 1.5 and then do the rest in 1mm. Yes, mixed cable sizes are fine provided that the smallest cable is compliant for the size and type of OCPD. AND that the voltage drop for the entire circuit is within acceptable limits.

What is 1.5 mm cable used for?

1.5 mm is most commonly used for lighting circuitry and switches. 2.5 mm is most commonly used for ring mains, plug and socket wiring. 4 mm is most commonly used for high power ring mains, plug and socket wiring. 6, 10 and 16 mm are most commonly used for high powered small appliances such as cookers.

Can I use 1.5 mm Armoured cable for sockets?

2.5mm SWA is ok to use, even 1.5mm at a stretch if everything is protected by a 13A fuse and an RCD and the length isn't too long reducing the volt drop too much.

How many sockets can a ring main have?

There is no limit on how many sockets you can install on a 32-amp ring main. However, the maximum load for a circuit at any given time should be 7,500 watts. Thus, while the number of sockets is not limited, the number of appliances and electronic devices you use at the same time could be limited.

Is 2.5 mm cable OK for Spur?

The unfused spur should supply just one single or one double (twin) socket outlet. It should be wired in 2.5mm2 P.V.C./P.V.C. T&E cable.

Is it OK to spur off a spur?

The reason for not running two spurs from the same spur "point" is that it can lead to possible overloads in that one leg of the final can become unbalanced and exceed the max.

Can I run a spur off a ring main?

A spur can be connected to an existing socket, on either a ring main or a radial circuit, providing that socket does not already have a spur. That is only one spur per socket is allowed and the number of spurs must not exceed the number of sockets.

Should I use 1.5 mm or 2.5 mm cable?

You will find twin core and earth cabling used all over your home in a variety of sizes. 2.5mm is commonly used for behind sockets, while 1-1.5mm is most often used for lights (depending on how many lights you have in a circuit).

How much load can a 1mm cable take?

Then according to this algorithm we know: copper wire per 1 square millimeter area, if the 220V is used in single-phase circuit, it can safely carry the load current through the 1KW; if used in three-phase balanced load (such as motor) circuit, can safe current carrying load by 2.5KW.

Can I use a 2000 W load with a 1.5 mm wire?

If we consider 2kw load is connected to the single phase 240volts supply,it draws a current of 9 amperes, so you can use a 1.5 sq. mm wire which can with stand up to 16amp.

What is the current carrying capacity of 1.5 sq mm copper wire?

The 1.5 mm wire load capacity is controlled at 2860W.

Can I use 2.5 mm cable for lighting?

2.5mm should be fine so long as the breaker is <= 10a. In fact it's actually quite a good idea as it will help with volt drop. Personally I would say that he must have some other reason for insisting on this as no spark in his right mind would get busted up over the cable size being too big.

What size MCB for a ring main?

The guide says that a ring main of 2.5mm cable is to be used with a 32amp MCB.

How many amps can 2.5 mm cable take on a ring main?

Given 2.5mm twin and earth clipped direct is 27 amps, times two for parallel is 54 amps for a clipped direct, ring.

Can I use a junction box to extend a ring main?

Effectively you cut the wire on the ring feeding a new wire to socket via a juction box, then feed a wire from socket back to the other wire on the ring via a juntion box. Extending the ring gives you the option to extend in the future.