What is a CCU in electrical terms?
A consumer unit is a type of distribution board (a component of an electrical power system within which an electrical power feed provides supply to subsidiary circuits).
What is a fire rated consumer unit?
The unit is designed to extinguish fires in the early stages, meaning that in many cases the consumer unit, as well as the wiring, will take only minimal damage and will not need replacing.
Can I still use a plastic consumer unit?
Are plastic consumer units legal? Yes. You can buy a brand new plastic consumer unit, so long as it’s housed in a non-combustible casing. Any old plastic consumer units are still legal too, they’ll just need new casing to make them meet regulations.
What level of protection is required for a consumer unit?
IP rating
The consumer unit is required to have a minimum IP rating to prevent a person from touching live parts and to prevent conductive or combustible materials from falling into the consumer unit.
Do all consumer units have RCD?
As of July 2008, the Wiring Regulations states that all new or rewired homes must have RCD’s fitted. Fixed RCD’s are the most common and are the ones in your consumer unit and give you protection over a group of circuits.
When did metal consumer units become law?
st January 2016
1st January 2016 marks the implementation of the switch to metal clad consumer units for all new electrical installations and designs.
How often should a consumer unit be checked?
every ten years
Furthermore, homeowners should have their consumer unit check at least every ten years, although you can do this more frequently if you wish. Landlords are required to have the check performed more often, every five years, and if new tenants move in, it should be checked again.
What is the electrical resistance of a circuit?
It is given by, The electrical resistance of a circuit is the ratio between the voltage applied to the current flowing through it. The unit of electrical resistance is ohms. Electric charge flows easily through some materials than others.
What is a close control unit (CCU)?
The Close Control Unit (CCU) shall provide a full temperature/humidity control system. Each CCU shall consist of an indoor evaporator module and a condensing module. The evaporator shall be installed against a wall inside the computer room. The system is also to include a humidifier which operates with a normal domestic water supply.
What is the SI unit of electrical resistance?
The SI unit of electrical resistance is measured in ohm, and mathematically it is represented by Ω. The unit ohm (Ω) is named after German physicist and mathematician Georg Simon Ohm. In the SI system, an ohm is equal to 1 volt per ampere.
What are the components of a CCU?
Each CCU shall consist of an indoor evaporator module and a condensing module. The evaporator shall be installed against a wall inside the computer room. The system is also to include a humidifier which operates with a normal domestic water supply.