Search results for query: the fuse is to protect the cable

Hi, I have a TT system with 100amp DNO fuse with 25mm tails, my question is what size earth wire/cable should be used to the earting rod? I beleive that anything over 16mm would not fit into the earthing connector block! One other thing, the meter itself states 80amp, is this ok when there...

We have a power shower that is wired in to an FCU with 3A fuse in the loft. This is fed by a 10mm2 T+E cable back to a switch fuse in the garage with a 50A breaker in it. The switch fuse is fed by about 50cm of 10mm2 T+E directly in to the output side of main switch with integrated RCD on a...

...replace the 13A fuse with a 3A fuse in this IEC lead to add additional protection to the monitor & cable? Granted, the fuse is to protect the cable and not the device I know, but I still wondered amongst you experienced testers out there, what would you do here? Should I leave the fuse as is...

Whilst modenising my daughters kitchen, which is an extension into an outhouse with a concrete floor and a concrete flat roof. I have found that the previouse owner has ran a 45 amp supply to the cooker which is protected by a 45 amp rcd. From this supply they have spured a further two...

As part of some home renovations I'm going to be putting the electrical cables in the wall. Some building work is going through building control but when I queried the electrics they said i was fine to move cables and boxes as long as I'm not adding to or extending the circuit. Having looked...

Following on from this thread, I have heard it said that manufacturers CANNOT rely on the circuit OPD to protect their appliance from overload - ie the plugtop fuse on a toaster of the MCB in the CU for a cooker CANNOT be used as part of the manufacturer's design for overload protection. Put...

All, i LIve WITH a TT earthed system, thus struggle to meet 50v required disconnection times due to Ze value (around 15 ohms). if you split the incoming supply on tt, are you required to provide 1) RCD protection only 2) Overcurrent protection only (with RCD protection at the submain...

Afaict there are fuses to protect the mains cables down the street but usually no fusing down where the (smaller) service cables join the mains cables. Depending on local conditions the fuse protecting the mains cables could be very large indeed.

Hello all, I work mainly in the Air Con industry, the general wiring make up of an AC installation is, DB to External Compressor then Compressor to Internal Evaporator using a control cable. Since working in this industry I have always been concerned with the control cable. The current draw of...

Hi My mother in law has just had a new fuse board fitted. The electrician informed us that the 2 showers in the house (1 a 10.5kw & 1 a 8.5kw) are each fed by 6mm cable. The 8.5kw was on a 40a cartridge fuse and the 10.5kw on a 45a cartridge fuse. He said the cable is sufficient for the 8.5...

Because, regardless of the notion that "the fuse is there to protect the cable", that doesn't stop it protecting other things. Given that there's no reason (with non-weedy cable) not to use a 1A fuse (for a very small load), and there is just about an outside chance that blowing of a 1A fuse...

Not entirely, it is correct that a fuse needs be provided to protect the cable downstream from short-circuit current, in your case the MCB at the board is adequate to protect both the 10mm cable and the smaller cable. Example: Theoretically the 10mm cable may be fused up to 63A. A 63A fuse...

Installing a power shower in our new en suite. I'm am going to take a spur from the ring main. Shower unit protected with a 3 amp fuse (outside the en suite ) My question is . Am I correct in using 2.5mm ring main cable?

Just a quickie. A cable connected to a house ring, it leaves the ring as a spur, using armoured cable, then goes underground to a shed or garage. Does any cable, as it leaves a house, need additional fuse protection at that point - is there a reg stating so? Is the mcb/rcbo at the CU good...

Fuses are to protect cables; not appliances. If it requires a lower rating to protect the device, it should have internal fuses.

Would appreciate some advice: Extended my kitchen by knocking down a wall to a utility room. The utility room incorporated a connection for an electric kiln used by the previous house owner. The cable is on a dedicated radial circuit to the CU. I want to move this cable (4mm) to supply my...

Hi, a built-in oven, consumes 3.6 kW. It needs 20A protection. It is small enough to be taken off the ring main in the kitchen. Running a cable for it back to the CU is impractical, a massive job, so off the ring it has to go. there is enough capacity on the ring. At a push a small 2 way...

We did this, but dont forget an MCB/fuse of a suitable rating in an enclosure prior to reducing CSA to protect the cable, in the event the cable is damaged and you get a LN fault. Its not good enough (IMHO) to rely on the fuse in the appliance or fused switch to protect the cable.

Yes, but the fuse/mcb is there to protect the cable. It may be possible to install 10mm² cable and to protect that with a 45amp fuse but that will depend on a number of factors relating to the cable's length and routing. Oh, BTW. If you run a new cable then you'll need to protect it with a...

The cable has to be protected by the fuse supplying it. So, if you have a 32A device protecting the main circuit cable, that cable should be able to carry 32A, which 6mm² can. Likewise, if you protect the cable with a 3/5A fuse (like you will at the spur for the light), that cable needs to be...