Fuse Lockout Devices

What is a Fuse Lockout Device?

A fuse lockout device secures a fuse holder in its de-energised state so a fuse cannot be reinserted while electrical maintenance is in progress. It does not, by itself, de-energise the circuit – that is achieved by opening a disconnector or circuit breaker upstream and verifying the circuit dead. The lockout then occupies the fuse base or grips the fuse carrier, preventing re-insertion by any second worker until the authorised employee removes it.

Like plug and breaker lockouts, the device is a secondary backstop that holds the isolation procedure in place and provides visible confirmation that work is in progress. Our range covers bottle fuses (DIAZED, NEOZED), NH fuse strips, and common cartridge holders up to 400 A.

E-Square – Fuse Lockout Manufacturer & Supplier

E-Square Alliance is India’s largest lockout tagout manufacturer, with over 1,800 LOTO SKUs designed and produced in-house at our New Delhi facility. Our fuse-lockout range is one of the widest available from a single manufacturer – covering DIAZED/NEOZED round and bottle holder lockouts, NH fuse blanking inserts, clamp-style and universal fuse holder lockouts, fuse blockers, and insulated fuse pullers. All tooling, including proprietary operating tools for round fuse inserts, sits within our own moulds, backed by 72 design patents. We hold One Star Export House status and ship direct to industrial buyers, distributors and resellers in 109+ countries.

As an OEM supplier to major international brands, our products meet global procurement quality and compliance standards – a bar we have maintained for 24+ years. E-Square is MSME ZED Gold certified, a Sedex Active Member and a British Safety Council Member. Every fuse lockout is built for real plant conditions: non-conductive ABS/polycarbonate bodies, IEC-compliant dimensional fit, and colour and labelling that survives shift-after-shift handling.

Our Range of Fuse Lockout Devices

We manufacture five families to match the fuse system and the role each device plays in the isolation procedure. Each family below is a live sub-category filter – browse it for exact fuse sizes, current ratings and model codes. If you are unsure which lockout fits your holder, contact E-Square’s technical team.

Standardising fuse isolation across switchrooms or distribution boards?
We supply the full fuse-lockout range in volume, with colour coding, laser engraving and private labelling for branded LOTO programmes. Custom kitting accepted.

How to Choose the Right Fuse Lockout

The right fuse lockout depends on three things: your fuse system, the amperage class, and whether your procedure requires a padlockable device or a blocking backstop. Answer the five questions below to identify the correct model.

What fuse system is it?

Bottle/round (DIAZED DII/DIII or NEOZED D01–D03) → round fuse holder lockout (ES-RFHL and ES-RGHLC) or dummy (ES-RFHD). Low-voltage NH fuse strips (NH00–NH3 in a fuse-switch disconnector) → NH fuse blanking insert. Common blade/cartridge holders 20–400 A → clamp-style standard lockout (ES-FHL-TGT / ES-FHL-WGT) or universal (ES-UFHL). Multi-pole blade fuse holders where the procedure uses tagout only (no personal padlock required) → fuse blockers (ES-FB-2W / ES-FB-4W).

What’s the fuse size and rating?

Bottle fuses: match the thread and amperage class – DII (E27, 2–35 A), DIII (E33, 35–63 A) for DIAZED; NEOZED uses D01 (E14, 2–16 A), D02 (E18, 20–63 A), D03 (E27, 63–100 A). NH: NH00 / NH000 up to NH1 / NH2 / NH3. Clamp lockouts cover 20–400 A across most common cartridge holders.

Do you need a personal-padlock lockout or a blocking backstop?

If the device itself must accept a personal padlock as the OSHA 1910.147(c)(5) lockout point, choose ES-RFHL, ES-RFHLC, ES-FHL-TGT, ES-FHL-WGT or ES-UFHL. If the upstream disconnect is the primary lockout point (standard for NH fuse-switch disconnectors), the ES-RFHD dummy insert or NH blanking insert acts as the secondary blocking backstop – no padlock is required on the insert itself.

One holder type or many across the site?

For a single standardised holder type, the specific ES-RFHL or clamp lockout is the most secure fit. For a mixed or unidentified estate, the universal fuse lockout (ES-UFHL or ES-UFHL-S) covers a wide range of cartridge holders in a single SKU.

Do you need to remove the fuse first?

Yes – in nearly all procedures. Use an insulated fuse puller to extract the fuse safely once the upstream circuit has been isolated and verified dead. The puller protects against arc-flash exposure during extraction and is a required handling aid for RFHL, RFHD and NH blanking insert procedures. It is not a lockout device.

Not sure which fuse lockout fits your switchgear?

Talk to a LOTO specialist

Benefits of E-Square Fuse Lockout Devices

Our fuse-lockout range is engineered to sit cleanly inside a properly designed electrical isolation procedure:

• Padlockable at the fuse point: Satisfies OSHA 1910.147(c)(5) without a separate lockout station.
• Blocks accidental re-insertion: Physical occupation of the fuse base, not just a tag.
• Covers tagout-only deployments: Fuse blockers for multi-pole circuits where lockout conditions aren’t met.
• Non-conductive under fault: ABS/polycarbonate; rated 4°C to 121°C.
• Guaranteed dimensional fit: Sized to IEC 60269-2 and IEC 60269-3 fuse classes.
• Customisable: Colour coding, laser engraving, private labelling, complete LOTO kits.

Compliance & Standards

Our fuse lockout devices are designed to support compliance with the standards that govern how electrical maintenance work is isolated, secured and verified. Key applicable standards include:

• OSHA 29 CFR 1910.147 (Control of Hazardous Energy)
• OSHA 29 CFR 1910.333 (Electrical Work Practices)
• NFPA 70E-2024 Article 120
• EN ISO 14118:2018
• AS/NZS 4024

Regulatory requirements vary by jurisdiction and industry. Always verify current requirements with your local authority or a qualified safety professional.

Fuse Lockout Devices for Every Industry

Anywhere fuse-based isolation is part of the electrical maintenance procedure, our devices apply. Specific demand is heaviest in:

Power & Energy Oil & Gas Chemical Fertiliser Cement Steel & Iron Construction FMCG

Why Choose E-Square Fuse Lockout Devices?

• Full fuse-lockout range, one manufacturer: Five families from bottle/round and NH rail to universal lockouts and pullers, all made in-house
• Direct-from-manufacturer: Factory pricing, low MOQ acceptable, full quality control, fast lead times
• Global supply: Exporting to 109+ countries, Star Export House (DGFT)
• Customisation: Colour coding, laser engraving, private labelling, custom kitting

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