Short for Alternating Current.
Short for Direct Current.
Small charged particles that exist as part of the molecular structure of materials.
An electron that is easily separated from the nucleus of the atom to which it belongs.
Bodies that possess free electrons (metals, for example, but also the human body and the earth).
Bodies that do not possess free electrons (e.g., glass, plastic and wood).
The difference in charge between two points.
The rate at which charge is flowing.
A material's tendency to resist the flow of charge (current).
A closed loop that allows charge to move from one place to another.
Any material that allows electrical energy to be converted to thermal energy.
Additional power available for a short amount of time.
Short for Valve Regulated Lead Acid Battery.
Absorption voltage range
The level of charge that can be applied without overheating the battery.
Float voltage range
The voltage at which a battery is maintained after being fully charged.
This is a circuit breaker and contains many electrical circuits. Using this, a circuit can be turned on or off.
Circuit breakers and Fuses:
These protect wires from overheating and are found in the distribution panel box. When there is an overload, that is, too much current flowing, the fuses will blow or the circuit breakers will trip. Fuses and circuit breakers are rated so therefore at a particular current, they will be damaged by the circuit will be off.
Switches can energize circuits, that is, they allow a current to flow through. If carelessly used, these can cause damage to a person and to equipment. Receptacles connect the appliances to a circuit.
connecting metal parts of electric appliances to earth.
Comparison of UK-US Terminology
For the purpose of this guide US terminology is more frequently used.