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Martindale LOKFS1 Universal Fused Spur Locking Off Device

The Martindale LOKFS1 Universal Fused Spur Locking Off Device is a simple yet essential safety tool for ensuring safe local isolation of electrical circuits. Designed for single-gang fused spur connection units that comply with BS 1363-4, it’s ideal for maintaining compliance with the Electricity at Work Regulations.

Once the fuse is removed, the LOKFS1 prevents it from being reinserted — ensuring that the circuit remains safely isolated while maintenance or installation work is carried out. This makes it an effective choice for work on fixed-wired appliances such as cookers, boilers, hand dryers, and water heaters.

Installation is quick and tool-free. Simply loosen the facia plate screws, position the LOKFS1 over them, and retighten. The device can then be secured using a compatible padlock for added safety. Made from durable, non-conductive polypropylene with no metal components, it’s built for long-lasting performance in demanding environments.

Key Features

Enables safe local isolation in line with UK safety regulations
Universally compatible with most fused spur connection units
Tool-free installation — quick, easy, and secure
Prevents fuse reinsertion during maintenance work
Designed to accommodate flexible outlet cabling
Constructed from durable, non-conductive polypropylene
Compatible with Martindale PAD11 and PAD21 Series padlocks (sold separately)

The Martindale LOKFS1 is ideal for electricians, maintenance engineers, and safety professionals who need to ensure circuits remain securely isolated during electrical work.

Electricians & Contractors: Prevent accidental re-energisation while carrying out installation or maintenance work.
Facilities & Maintenance Teams: Maintain safety compliance when servicing or inspecting fixed-wired equipment.
Health & Safety Managers: Support lockout/tagout (LOTO) procedures as part of workplace electrical safety standards.
Training Providers & Colleges: Use as a teaching tool for safe isolation practices and electrical safety training.

What's Included

1 x Martindale LOKFS1 Universal Fused Spur Locking Off Device

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