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Electrical Supply and Earth Continuity

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Central Heating Wiring Diagrams

Electrical Current

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Electrical tests

Testing Equipment

Types of Electrical Tests

Central Heating Wiring Diagrams

Central Heating Diagrams

Electrical Current

Types of Electrical Systems


Fuse Types

Safety Requirements

Wires and Cables

Cable Protection

Cable Sizing

Cable Types

Electrical Circuits

Electrical Bathroom Zones

Electrical Components

Electrical Fittings

Switches and Sockets


Earth Bonding

Earth Bonding

Direct Current (DC)

  • Produced from: batteries, photovoltaic solar panels, thermocouples, rectifying alternating current (AC)
  • Thermocouples are often found in boilers
  • Batteries – two dissimilar metal rods (electrodes) immersed in an acid solution (electrolyte)
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Alternating Current (AC)

  • Conductor is moved through a magnetic field
  • 1000Ω – human's body
  • I=V/R
  • I=W/V
  • W=V2/R
  • Electronic controls for plumbing systems should be hard wired in
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