Can I use RCBO for shower?

Electric showers should always be installed using an RCD or an RCBO. The RCBO is the better option as this gives overload, short circuit and Earth fault protection.

What RCD to use in shower?

For new installations, a 30 mA Residual Current Device (RCD) must be incorporated into the electrical supply to the shower in accordance with the current wiring regulations. When replacing an existing electric shower, we recommend that a 30 mA RCD is fitted if not already provided.

Do electric showers need RCD protection?

Electric Showers

All circuits in a bathroom must be protected by a RCD (Residual Current Device). They will need to be connected to the consumer unit and protected by an RCD.

What size RCD for 9.5 kW shower?

If the shower is rated at 9.5Kw at 240V then based on the nominal voltage of 230V the shower would work out at about 37.95A. At 240V it comes to just under 40A so the 40A OCPD is fine.

Is MCB OK for electric shower?

If the shower is on High setting it will use 8.5kw to heat the water to temperature set point whether it's on 1 or 10. An Mcb will not limit current. Other than when it trips then it will limit it to Zero.

What's the difference between an RCD and an RCBO? - Circuit protection.

What size MCB for a 10.5 kW shower?

I have been asked for my advice regarding the installation of a 10.5kw shower. The shower is currently protected by a 32A mcb which is protected along with other circuits by an rcd for the consumer unit.

What size MCB do I need for a 8.5 kW shower?

An 8.5kW shower draws a current of 35.5A. So, you need an MCB higher than this value. Next size up is 40A.

Is 6mm cable OK for a 9.5 kW shower?

Electric Shower Power Ratings and Power Cable Information

Showers up to 9kw may carry a 6mm cable as long as the shower unit is within 18 meters of the fuseboard. Fuses and switches should be rated at 40 amps. Showers up to 12.5kw should carry a 10mm cable to units within 35 metres of the fuseboard.

What size RCD for 8.5 kW shower?

6mm is slightly under for an 8.5kw shower. However 30amp is adequate for the cable but ought to of tripped for that shower. I would suggest upgrading your fuse board to something that has RCD protection for the circuit and shower.

Does a shower need a isolation switch?

To my knowledge there is no specific reg that says you must have an isolator but there is a regulation that requires all equipment to be installed in accordance with manufacturers instructions, so if they say it should be installed with an isolator then it should have one.

What size breaker do I need for a 7.5 kW shower?

I believe that the recommended fuse rating for a 7.5kw shower is 32amp. Using a 30amp fuse could give you problems.

What size breaker do I need for a 10.8 kW shower?

When replacing a 9.5kW electric shower with a 10.8kW, the MCB tips out each time it's used. Why is this? First, check the MCB current rating; a shower of this kilowatt rating should have a 45 amp.

What size MCB for 9.8 kW shower?

a 9.8kw load is around amps (9800watts divided by 230volts = 42.6 amps), so ideally a 45amp BSEN60898 MCB or a BSEN61009 RCBO (if your existing fuseboard does not have RCD protection), should be used.

What cable do I need for a 9.5 kW shower?

You could get away with a 6mm cable for a 9.5kW shower.

What cable do you use for an electric shower?

The size of cable that can be used for an electric shower depends on a number of factors which includes, the kilowatt rating of the shower, the method of cable installation, any de-rating factors and the length of circuit. In some cases 6mm cable will be adequate for a shower rated up to 8kW.

What cable do I need for 8.5 kW shower?

6mm cable is well within specifications for 8.5kw shower, providing it doesn't exceed max length allowed (for 6mm doing 8.5kw) and consideration is given to cable install, such as not burying it in loft insulation.

Can I run a 10.8 KW shower on 6mm cable?

As a rule of thumb yes the cable will certainly need to be 10mm for that rated shower.

How many amps does a 10kw shower use?

Depends on the exact voltage at the location, could be anywhere between 39- 42 amps in reality. Lack of planning on your part doesn't make it an emergency on mine.... 40a breaker is fine. In this I believe that you are mistaken.

How many kw can a 6mm cable carry?

That means that 6mm is ok for 10.5KW showers (SOMETIMES).

Can I join 6mm shower cable?

A standard 7.5 to 8Kw shower is fine on 6mm cable. Ideally the pro's and cons of both cables and costs should have been discussed, but the risk is that if you fit an 8.5kw or higher powered shower on the installed 6mm cable, the cable may be overloaded and get damaged. Hi there, You can use 6mm cable for up 9.2 kW.

Can a 6mm go on a 40a MCB?

2 Answers from MyBuilder Electricians

6mm twin and earth cable (which this almost certainly is) can be backed up by a maximum of a 32a MCB, even lower if other factors are involved. You'll need that 10mm cable and a 40a MCB unfortunately as your shower is going to draw over 32a.

Why does my electric shower keep blowing the fuse?

Overload. The most common reason why you water heater is tripping the circuit breaker is overload. A number of appliances can cause an overload if they malfunction, but shower heaters can cause that even if they're working properly.