Electrics for plumbers

What size cable is used to wire an immersion heater to a switched fuse spur

• 2.5mm twin and earth

• 1.5mm butyl heat resistant flex

• 1.5mm flex

• 1.0mm butyl heat resistant flex

What is a legal required device to have on an Immersion heater

• It is a legal requirement to have automatic thermostat on the immersion

• It is a legal requirement to have a cold trip out device on the immersion heater

• It is not a legal requirement to have a thermal cut-out device on the immersion

• It is a legal requirement to have a thermal cut-out (reset) device on the immersion

Voltage = V this is:

• The unit for electromotive force (emf): the higher the voltage the greater the force is, to cause electrons to flow along the conductor

• It is the unit of current, and can be defined as the unit of quantity or volume passing down a conductor

• It is the unit of resistance, which opposes the flow of current.

• It is the unit of power for an appliance. Power is used in making an appliance work. As some power is absorbed, an appliance is never 100% efficient

What colour is the live cable that connects to the plug fuse

• Blue

• Black

• Brown

• Green/yellow

What is OHM's law

• A law relating the voltage difference between two points, the electric current flowing between them, and the resistance of the path of the current.

• The law that says you are only allowed to work on electrical supplies if you are a qualified electrician

• A law relating the voltage difference between electrics when the current is on and then off .

• Part P of the building regulations that permits electrical work in a danger zone like a bathroom, kitchen, cloakroom or out house

What is this electrical item and its use

• A switched fused spur used to isolate both the live and neutral when turned off - used to connect shower pumps and immersion heaters to an electrical supply under 13 amps

• A light switch used to isolate the live and neutral when turned off - used to connect shower pumps and immersion heaters to an electrical supply

• A switched fused spur used to isolate the neutral wire when turned off - used to connect shower pumps and immersion heaters to an electrical supply

• A switched fused spur used to isolate both the live and neutral when turned off - used to connect electric showers and cookers over 16 amps

Which of these are all common electrical faults

• •Electrocution,•Electric shock

  •Fire,•Component failure

  •Reduced life of component

• •Electrocution,•Electric shock

  •Cheaper electricity ,•Reduced life of component

• •Electrocution,•Electric shock

  •Fire, •Component failure

  •increased life of component

• •Electrocution, •Electric shock

  •Water damage , •Component failure

  •Reduced life of component

What can cause electrical faults

• Incorrect fuse size

• Incorrect flex size

• All the answers

• Bad installation

• Damaged cables

Where would you use this type of switch

• Immersion heater

• Electric instantaneous shower

• Shower pump

• Boiler control

What is the name for this switch

• Double pole pull switch

• Single pole pull switch

• Triple Pole pull switch

• Switched fused spur