Do Not Operate Prohibition Signs tell people not to use machinery, controls or equipment when operation could create risk. They help you manage maintenance, faults, isolation and restricted-use situations in workshops, plants, warehouses and service areas.

Best Positions for Do Not Operate Safety Signs

You should install these signs directly on or beside the machine, switch, control point or access door that must not be used. Place them at eye level where the person reaching for the control will see the instruction before acting.

Viewing Distance Guidance for Do Not Operate Signs

Choose the size around how close the user stands before operating the equipment. Smaller signs suit hand controls and cabinets; larger sizes work better for workshop doors, plant rooms and machinery seen across a bay.

Size option	Suggested viewing distance	Practical use
H 150 x W 125 mm	Up to 3 metres	Controls, panels, cabinets and small machines
H 210 x W 148 mm	3–5 metres	Machine fronts, workshop benches and plant access points
H 297 x W 210 mm	5–8 metres	Larger equipment, service rooms and busier work areas

What Changes After You Display Do Not Operate Signs

Once installed in the right place, the sign gives a clear stop instruction before someone starts a machine, resets a control or uses equipment that may be unsafe, isolated, faulty or under maintenance.

✅ Reduces accidental start-up during maintenance or inspection work.

✅ Helps staff and contractors recognise equipment that must stay unused.

✅ Supports safer handover between shifts, engineers and operators.

Do Not Operate Sign Technical Details

Sign message: Do not operate
Purpose: prohibits unsafe operation
Sign type: prohibition
Symbol code: EN ISO 7010 P001
Pictogram: general prohibition symbol
Conforms to EN ISO 7010
Supports BS 5499 safety sign practice
For Safety Signs and Signals Regulations use

Materials: rigid plastic, self-adhesive vinyl or removable repositionable vinyl
Sizes: H 150 x W 125 mm, H 210 x W 148 mm or H 297 x W 210 mm
Orientation: portrait
Shape: rectangular sign
Background colour: red and white
Text colour: white
Symbol colour: red
Finish: glossy film surface

Non-photoluminescent
Non-reflective
Supplied as single sign
Material thickness: varies by option
Where to use: machines, controls, doors and equipment
Display area: indoors or outdoors
Rigid plastic fitting: fixings available separately
Vinyl fitting: adhesive-backed, with removable option repositionable

ⓘ Installation Guidance

Practical Fitting Advice for Do Not Operate Signs

❌ Fitting errors that weaken the warning

❌ Do not place the sign away from the actual machine or control.

❌ Do not hide it behind guards, stored stock or open doors.

❌ Do not choose a small size for equipment viewed from several metres away.

❌ Situations where this sign is not enough

❌ Do not rely on it as a substitute for lock-off or isolation procedures.

❌ Do not use it where a specific hazard warning sign is also required.

❌ Do not fit removable vinyl where constant weathering or abrasion is expected.

✅ Better placement decisions on site

✅ Position it at the decision point before anyone can operate the equipment.

✅ Use rigid plastic where the sign needs a stronger long-term fixing.

✅ Clean and dry the surface before applying adhesive vinyl for a secure finish.

? Customers Questions

Do Not Operate Prohibition Signs questions answered

What are Do Not Operate Prohibition Signs used for? They tell people not to use a machine, control or item of equipment where operation could cause risk, damage or unsafe movement.

Should I use this sign during machinery maintenance? Yes, it is useful near equipment that must remain unused during servicing, inspection, fault diagnosis or temporary isolation.

Which material should I choose? Use self-adhesive vinyl for smooth indoor surfaces, removable vinyl for temporary control and rigid plastic for longer-term wall, door or equipment mounting.

Does the general prohibition symbol need text? Yes. EN ISO 7010 P001 is a general prohibition symbol, so the Do not operate wording makes the exact instruction clear.

Where should I place a do not operate safety sign? Put it where someone is most likely to reach for the control, open the door or start the equipment before they see any other instruction.

✔ Features & Benefits

Do Not Operate Signs Features and Practical Benefits

Features

✓ Clear Do not operate message for immediate recognition.
✓ EN ISO 7010 P001 general prohibition symbol with supporting text.
✓ Three size choices for close-range or wider workplace visibility.
✓ Material options for smooth surfaces, doors, machinery and walls.

Benefits

✓ Helps stop equipment being used while unsafe, faulty or isolated.
✓ Gives contractors and staff a direct instruction before they act.
✓ Reduces confusion during repairs, servicing and machine checks.
✓ Lets you match the sign to the surface, setting and expected wear.

Portrait equipment restriction sign choices

For a wider option, compare landscape do not operate prohibition signs where the message needs greater horizontal visibility. Useful for machinery fronts and workshop walls.

If the equipment is out of service, choose portrait out of order do not use signs for a more fault-focused warning. Helps stop staff using unsafe or unavailable equipment.

Where competence matters, use qualified personnel only operating signs beside specialist machinery. Suitable for reducing unauthorised use.

For lockout and power control, add multi-message do not switch on safety signs at isolation points. Good for repair, servicing and shutdown conditions.

For more closely related notices, view machinery prohibition signage for operator control when building a consistent warning set. Helps you cover misuse, faults and access control.

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