تغذية المعدات المحمولة باليد

How this is calculated#

The tool lists how a hand-held appliance may be supplied. It reads regs 88, 89 and 89A of the Electricity (Safety) Regulations 2010. It points at the regulation. It does not rule on a site or a system.

1. Situation. You pick where the appliance is used. The choices are anywhere, immersed or conductive surroundings, damp, outdoor or under construction, or a cramped space.
2. Regulation. The tool picks reg 88(1) for any appliance, or reg 89 or 89A for the harder situations.
3. Voltage to earth. It gives the maximum voltage to earth from reg 88(2). For an earthed source in some situations, it gives the lower figure from reg 89(2)(d).
4. Paragraphs. It counts the connection methods or supply arrangements the regulation lists. It then names each one.

Worked example#

A hand-held appliance used outdoors or on a building site. The tool lists 7 supply arrangements under reg 89(2). The maximum voltage to earth is 250 V. For an earthed source it is 55 V.

Limits#

• The tool is a pointer. It is not a ruling and it is not advice.
• The paragraphs of reg 88(1) are alternatives. They are not a cumulative set.
• Reg 88(3), reg 89(3) and reg 89A(2) address offences. The tool holds none of that detail.
• The tool read the regulations as at 15 January 2026. Check for a later version.
• It does not check the cord length or the RCD. Use the site cord length and RCD selection tools.

See also: Construction site supplies, AS/NZS 3012, RCD selection and Electricity safety regulations reg 57 and reg 59.