Level 1 Diploma in Carpentry and Joinery

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PowerPoint presentation

Power sources

Unit 114: Prepare and use carpentry and joinery portable power tools

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Aim

Introduce learners to power sources used with power tools.

Objectives

• List at least two voltage power sources used for power tools.

• Identify at least two plugs associated with the voltage power sources.

• List at least one power source available without electricity.

• List at least two power sources for a selection of three power tools.

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Types of power supply

There are four main types of power supply for power tools. These are:

• battery

• 110V mains supply

• 240V mains supply

• compressed air.

But there are two other types of power source too. These are:

• canister gas: used alongside batteries in nail guns

• gunpowder cartridges: used in specialised nail guns, which drive heavy duty fixings through steel, commonly known as a Hilti Gun.

NEVER use an unsuitable power source as this could have catastrophic consequences.

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Good practice

For tools that need to be connected to a power supply this can be 230V (normal domestic mains supply) or 110V (as a reduced voltage via a transformer).

The use of tools at 230V is not recommended, as any electrical shock from the tool at this voltage can be fatal.

Only tools using a supply of 110V, reduced from 230V through a transformer, can be used on construction sites.

All power tools are now made with double insulation and should be stamped with a double insulation sign.

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Double insulation symbol

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Transformers

Below is a transformer that is used to reduce voltage from 240V to 110V.

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Voltages

Here are the plugs used with each voltage.

Notice the colours of the plugs.

The colours indicate the voltage.

The position and numbers of pins inside the plug also indicate the voltage. They help ensure that the correct plug is used.

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Alternative power sources

Batteries

Compressor

Gas

Generator

Images courtesy of www.screwfix.com. Reproduced with permission.

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Any questions?