ISO M006 Disconnect mains plug from electrical outlet Sign

What ISO 7010 M006 Tells You to Do

M006 shows a plug being pulled from a socket on the standard blue mandatory disc, and its ISO register definition is unusually specific about when it applies: the mains plug must be disconnected for maintenance of electrical equipment, in the case of malfunction, or when the equipment is left unattended. That three-part trigger — servicing, fault, absence — makes M006 the everyday, plug-level counterpart to industrial energy isolation.

The logic behind each trigger is the same: a plugged-in machine can still bite. Cleaning a blade with the cord connected leaves a startup switch one bump away from injury; troubleshooting a malfunctioning appliance while energized exposes the person to shock and unexpected movement; and equipment left running or connected without supervision can overheat or be started by someone who does not know its condition. Pulling the plug removes all three possibilities at once.

Typical Applications

M006 is common wherever cord-and-plug equipment gets opened, cleaned, or cleared of jams by its own operators. Commercial kitchens put it on slicers, mixers, and grinders whose cleaning routines bring hands near cutting edges. Workshops apply it to bench grinders, saws, and power tools ahead of blade or disc changes. Offices and print rooms use it on shredders and copiers where jam-clearing tempts people to reach inside a live machine.

It also appears in product manuals and on rating labels as a manufacturer instruction rather than a wall sign — a compact way of saying unplug before opening this housing. Laundries, salons, laboratories, and schools use M006 the same way: any environment where the person doing routine care of a small machine is not an electrician, and where the plug is the one isolation device everyone can operate correctly.

M006 Versus M021: Plug or Hard-Wired?

ISO 7010 deliberately splits electrical isolation into two signs. M006 covers equipment connected by a mains plug, where unplugging gives complete, visible isolation. M021 covers machines that are hard-wired or fed from multiple energy sources, where isolation means operating disconnectors and applying a formal lockout. Choosing between them is simple: if there is a plug the operator can pull and keep in view, M006 fits; if isolation requires a switch, breaker, or valve, M021 and a lockout procedure apply.

That split mirrors how lockout regulation treats cord-and-plug equipment. OSHA's hazardous-energy standard, for example, exempts plug-connected equipment from full lockout/tagout provided the plug remains under the exclusive control of the person doing the work. M006 signage supports exactly that practice: unplug it yourself, keep the plug where nobody else can reinsert it, and the machine cannot restart while your hands are inside.

When should equipment be unplugged instead of locked out?

Unplugging is sufficient isolation for cord-and-plug equipment when the person doing the cleaning or servicing pulls the plug and keeps it under their exclusive control, so nobody can reconnect it unnoticed. Hard-wired machines, or equipment with additional energy sources such as compressed air or stored mechanical energy, need a formal lockout procedure — that is the territory of the M021 sign.

What does the blue sign showing a plug and socket mean?

It is ISO 7010 M006, requiring the mains plug to be disconnected from the outlet before maintenance, in the event of a malfunction, or when the equipment is left unattended. It is typical on kitchen machines, power tools, shredders, and other plug-connected equipment that users open or clean themselves.

Why do slicers and food mixers carry a disconnect-plug sign?

Because their cleaning routine puts fingers directly against blades and beaters, and a connected machine can start from a bumped switch or a second person's mistake. Unplugging before cleaning removes the possibility entirely, which is why food equipment manufacturers and kitchen safety programs mark these machines with M006.

Does M006 apply to equipment with a battery as well as a plug?

The sign itself only addresses the mains plug. Cordless or dual-power equipment can still move or shock after unplugging, so the manufacturer's isolation instructions govern — typically removing the battery pack too. Where stored energy remains after the plug is out, M006 alone is not an adequate isolation instruction.