What type of footwear is recommended for electricians working on-site?

Insulated rubber boots are recommended for electricians working on-site primarily because they provide essential protection against electrical hazards. These boots are designed to prevent electrical shock, effectively insulating the wearer from potentially hazardous live electrical circuits. Rubber is a non-conductive material, which makes these boots suitable for environments where there is a likelihood of contact with electrical components.

In addition to protection against electric shock, insulated rubber boots also offer water resistance, helping to keep feet dry when working in wet conditions. This combination of insulation and waterproofing is vital for ensuring safety and comfort in various electrical work environments.

The other options do not provide the necessary protection required for electricians. For instance, steel-toed boots, while offering protection against physical impact and compression, do not provide electrical insulation. Cotton shoes lack both the protective qualities against impacts and the insulation needed for electrical safety, and sandals do not offer adequate protection or support, making them highly unsuitable for any electrical work.