Electrical Lockout Devices for Breakers, MCBs, MCCBs and Plugs
Section 57 of the Occupational Safety and Health Act 2007 requires transmission machinery to have “efficient devices” for prompt disconnection of power — for electrical panels and plugs specifically, that means a physical lockout device fitted over the breaker, switch or plug itself, not just a padlock hung nearby. SHL stocks nine electrical lockout devices covering the breaker types, plugs and distribution-board formats found on Kenyan sites.
Circuit breaker and MCB/MCCB lockout
The core of the range is breaker isolation: a Universal Circuit Breaker Lockout Device (SKU 1506-UNI) and MCB & MCCB Lockout Device (SKU 1506-CBL) for standard breakers, a Push Button Type MCB Lockout Device (SKU 1506-PB, available in PIN-IN, PIN-OUT and PIN-OUT-WIDE versions) for the push-button breakers common on many distribution boards, and an MCCB Lock — Knob Tightening (SKU 1506-KT) for knob-style MCCBs. For a site that doesn’t know in advance which breaker types it will need to isolate, the MCB & MCCB Lockout Device Five Pc Set (SKU 1506-CBL 5SET) bundles five different devices, enough to lock out “almost any type of MCB, MCCB or ELCB” per SHL’s own product description.
Section takeaway
- Breaker lockout devices are matched to the physical breaker mechanism, not a generic “one size” part — a push-button MCB needs a different device than a knob-tightening MCCB, which is why the 5-piece set exists for mixed distribution boards.
Multipole breakers and tie-bar isolation
Larger installations often use multipole breakers, where a single lockout point needs to isolate several poles at once. The Universal Multipole Breaker Lockout (SKU 1506-UMPBL) and Tie Bar MCCB Lockout Device (SKU 1506-TB) are built for exactly this — the tie bar spans and locks multiple poles of an MCCB together rather than isolating a single pole.
Isolating plugs, not just panels
Two devices cover the plug end of the circuit rather than the panel: the Electric Plug Lockout (SKU 1506-LRPM, durable polypropylene, for heavy-duty operations) and the Cylindrical Electric Plug Lockout (SKU 1506-CEPL, a larger cylindrical design for industrial plugs). Isolating a plug is the correct control when equipment is portable or frequently reconnected elsewhere — locking a panel breaker doesn’t help if the same machine gets plugged into a different point.
Common questions
Which lockout device fits a push-button MCB?
The Push Button Type MCB Lockout Device (SKU 1506-PB), available in PIN-IN, PIN-OUT and PIN-OUT-WIDE versions to match different push-button breaker designs.
What’s in the 5-piece MCB/MCCB lockout set?
Five different circuit breaker lockout devices, bundled specifically so one set can lock out almost any type of MCB, MCCB or ELCB found on a mixed distribution board.
How is a multipole breaker isolated?
With a Tie Bar MCCB Lockout Device (SKU 1506-TB) or Universal Multipole Breaker Lockout (SKU 1506-UMPBL), both designed to lock multiple poles together rather than a single pole.
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