Electricity
installation

Here you will find everything related to electricity installations, so that you can solve any problems that may arise.

What is the circuit breaker?

The circuit breaker (CB) is a control element that automatically switches off the electrical installation when there are several devices operating at the same time and they exceed the power you have signed up for.

According to current regulations (article 10 of RD 1454/2005) it is compulsory to have this circuit breaker in homes. If you do not have it, a series of penalties will be applied to your electricity bill (second additional provision of Order ITC/1559/2010).

According to current regulations (article 10 of RD 1454/2005) it is compulsory to have this circuit breaker in homes. If you do not have it, a series of penalties will be applied to your electricity bill (second additional provision of Order ITC/1559/2010).

Do you have a CB at home?

If you don't have one, make sure you have a standardised box to put it in. If not, an authorised installer must install it for you.

If you require, we can take care of this for you with our Home Assistance service.

Any questions?

Here we tell you some of the important things about electricity installations.

Where is the CB normally located?

The Power Control Switch is generally located in the General Control and Safety Panel and tends to be placed in its first position.

This switch trips the entire system when the overall power demanded by all the appliances running at any given time exceeds your contracted power. If this occurs regularly, it means you have not contracted sufficient power.

What is the automatic main switch (AMS)?

The purpose of the switch is to prevent the entire household electric system from overloading or short-circuiting. This element was included in the General Control and Safety Panel relatively recently, which means that many switch panels may not feature one.

What is the Differential Switch (DS)?

It is used to quickly trip the electric system in the event of a power leak to ground to protect people from any risk of electrocution.

What are Small Circuit Breakers (SCBs)?

It also offers protection against short-circuits and power surges in inner circuits (lighting, heating, domestic appliances, etc.). There should be as many of these switches as there are circuits in the household.

To install a PCS, you will need a standardised switch panel box to house it. The estimated size of these boxes is 15 x 20 x 9 cm.

Why should the CB be installed?

According to Royal Decree 1454/2005, which modifies the provisions relating to the electricity sector, and to Order ITC 1559/2010, electric systems will be required to feature a compulsory power control device.

Therefore, for domestic systems with a contracted power of 15 kW or less, power control will be carried out by fitting a suitable Power Control Switch (PCS) depending on the amount of power contracted.

What happens if the CB is not installed?

Pursuant to additional provision two of the above-mentioned Order ITC/1559/2010, for domestic systems with a contracted power of 15 kW or less and no power control device, the amount billed for your contracted power will carry a surcharge according to the amount of power contracted, billing you 10 kW for under 10 kW and 20 kW for 10 to 15 kW.

Who can install the CB?

Before fitting a PCS, your electric system may need to be adapted and will need a standardised switch box to house the switch.

If you do not have one, please contact an authorised professional to install it for you, ready to house the PCS.

Should you need help, Iberdrola can provide it via the Home Assistance service.

Once you have a standardised switch box, there are two options:

  • You may ask for it to be fitted on a rental basis (according to currently applicable prices) by your power distributor company. They will install and seal it in one trip.
  • You may purchase a PCS elsewhere and have it fitted by an authorised professional. You will then need to contact your power distributor to check it and seal your PCS.

Once you have a standardised switchboard and your PCS is installed, you will need to inform the power distributor so they can bill you at the right fee and power level according to your supply (without the above-mentioned sanctions), in compliance with currently applicable regulations.

How much does it cost to install a CB?

Assuming you already have a standardised switch box to house a PCS (failing which, you will need to contact an authorised professional to fit it for you), there are two options:

  • You may ask your power distributor company to install it on a rental basis (monthly PCS rental price: from €0.03, depending on the type of system).
  • You may have it installed by an authorised professional. You will then need your power distributor to seal the installed PCS.

In either case, your distributor will bill you €9.04 (before tax) for checking and sealing your PCS.

What implications can installing a CB have?

If you have not contracted enough power, installing a PCS will cause your system to trip when several appliances are running at once.

If this occurs, you will have to contract more power. You can use our Power Calculator to calculate how much power you need.

To contract more power than is allowed for your system (according to each home's Electric System Certificate, formerly known as the Electric Bulletin) or for systems that are over 20 years old, your distributor will ask you to present a new System Certificate.

If you need one, Iberdrola can provide an authorised professional to adapt your home electric system. You may request this through the Home Assistance service.

What is the cost of the fees you have to pay for a power increase?

If you choose to increase your contracted power, you will also have to pay extra for the extension rights corresponding to that increase:

  • Extension Rights: 17.374714 €/kW (before tax).
  • Access Rights: 19.703137 €/kW (before tax).
  • Connection fees: €9.044760 per action (before tax).

Who should check and seal the CB?

You will need to contact the power distributor in your area to install (if necessary), check and seal your PCS.

The IBERDROLA DISTRIBUCIÓN ELÉCTRICA, S.A.U. telephone number is 900 171 171

To find out about the details of other distributors, see the list of Distributor Companies.

Customers and supply companies have the right to request the checking of the measurement and control equipment installed by them at any time and from the relevant body. The costs of this verification, as well as the settlement, are determined by the body.

If it is the customer who requests the check, but the measurement and control equipment is working correctly, the costs will be borne by the customer. In all other cases, they are paid for by the company.

The maximeter records the maximum power required by a customer in a period of 15 minutes. This serves to establish the power term of the billing period. It is usually placed on the active meter of the measuring equipment.

Actualmente, los maxímetros tradicionales de agujas están siendo sustituidos por equipos integrales. Con estos equipos integrados, ya no es necesario tener un contador para cada tipo de consumo y para registrar la potencia, dado que, como su nombre indica, integran varios contadores en uno.

Billing by means of a maxi-meter

Billing can be calculated in two ways:

  • If the power shown on the maximeter is less than 105% of your contracted power, you will be billed for 100% of that contracted power.
  • If the power shown on the maximeter is greater than 105% of your contracted power, you will be billed for the power shown by the maximeter plus twice the difference between the power shown and 105% of your contracted power.

Billing by means of a maxi-meter

Billing can be calculated in two ways:

  • If the power shown on the maximeter is less than 105% of your contracted power, you will be billed for 100% of that contracted power.
  • If the power shown on the maximeter is greater than 105% of your contracted power, you will be billed for the power shown by the maximeter plus twice the difference between the power shown and 105% of your contracted power.

This is the part of the installation that links the distribution network, owned by the distribution company, with the energy point, owned by the consumer. For both low voltage (LV) and medium voltage (MV).

As for its construction, it can be underground or overhead, depending on the type of distribution. In urban areas, for example, it is increasingly common for them to be underground.

The EIC, Electrical Installation Certificate or Electrical Bulletin is an official document that reflects the main characteristics of your installation, such as the installed power or the maximum power that the installation can supply, above which it cannot be contracted. You will only need it when you carry out a new installation or expand or alter the existing one.

It is issued by an installation company and presented to the competent body of the autonomous community where the installation is located, through its entry in the corresponding register, where it expressly declares that it has carried out the installation in accordance with the requirements of the Electrotechnical Regulations, approved by RD 842/2002 of 2 August and, where applicable, with the specifications approved by the electricity company, as well as with the Project or Technical Design Report.

It is issued by an installation company and presented to the competent body of the autonomous community where the installation is located, through its entry in the corresponding register, where it expressly declares that it has carried out the installation in accordance with the requirements of the Electrotechnical Regulations, approved by RD 842/2002 of 2 August and, where applicable, with the specifications approved by the electricity company, as well as with the Project or Technical Design Report.s

The competent body of the autonomous community must deal with the 5 copies of the EIC, returning 4 to the installation company, two for itself and the other two to the owner, so that the latter can, in turn, keep one copy and deliver the other to the electricity company, a requirement without which the latter will not be able to supply energy to the installation.

A copy of the certificate should be delivered to the distributor for registration, even if you already have an electricity supply. The distributor, who has a record of all the installation certificates from when the connection to the grid was requested for the supply of electrical energy, may request this when there is a substantial change in the conditions of supply: change of type of installation or increase in power due to the extension of the installation or new installation.

We can put you in touch with an electrical installation company through Mapfre MULTISERVICIOS, a leader in repairs and alterations. All you have to do is call 902 136 532.

Safety advice

We want to help you keep your electrical installation safe with these tips. Follow them and everything will be fine.

If you live with children, follow this advice

Do not leave electrical appliances within reach of children.

Keep sockets you are not using covered with protectors.

Avoid having electrical appliances, loose cables or plugs in the children's room.

Be especially careful with radiators.

Especially in the bathroom and kitchen:

Bathrooms and kitchens have a higher electrical risk as they are rooms with high humidity. Take special care in these rooms.

Do not use electrical appliances near the bathtub or the shower.

Never use electrical appliances with wet hands.

Do not use electrical appliances when you are barefoot.

Do not use a metal object to remove toast stuck in the toaster.

In the kitchen do not use appliances near the tap or in damp places.

To take care of your appliances and your safety

Turn off heating or cooking appliances before leaving your home.

Before cleaning an appliance, unplug it.

o unplug an appliance, never pull the cord, but pull the body of the insulating plug.

Never insert metal objects into appliances in use.

In an emergency situation

Make sure that the injured person is not in contact with any electrical conductor...

If they are, disconnect the power switch and if necessary the main switch. Do not try to detach them by directly grabbing them or by means of metallic elements.

If they are unconscious, try to revive them if you know the techniques, or call 112 immediately.

You might also be interested in ...

Other services that can make your life easier