Do Not Switch On Prohibition Signs tell people not to energise machinery, switches or equipment while work is in progress. They help you control accidental start-up risks in workshops, plant rooms, factories and maintenance areas where one wrong action could injure staff or damage equipment.

Where Do Not Switch On Signs Should Be Positioned

You should install these signs directly beside isolators, switchgear, control cabinets, machinery controls and equipment under repair. Place them at eye level where the person about to operate the switch will see the instruction before touching it.

Viewing Distance Guide for Do Not Switch On Signs

Choose the larger size where the sign must be read from a wider aisle, across a workshop route or near machinery with competing visual information. Smaller sizes work best beside close-range switches and local controls.

Size option	Suggested viewing distance	Best use
H 100 x W 250 mm	Up to around 3 metres	Local switches, small machines and close-range controls
H 150 x W 300 mm	Up to around 5 metres	Plant rooms, workshops and busier maintenance areas

What Changes After These Signs Are Fitted

Once installed at the point of operation, the sign turns a hidden isolation risk into a clear instruction. It helps you slow down unsafe switching, support maintenance controls and reduce the chance of machinery being energised too soon.

✅ Staff get a clear stop instruction before operating a switch

✅ Contractors are less likely to restart isolated equipment

✅ Maintenance work becomes easier to control and supervise

Do Not Switch On Sign Specifications

Sign message: Do not switch on
Purpose: prevents unauthorised switching
Sign type: prohibition
Where to use: machinery and switch areas
EN ISO 7010 code: P001 general prohibition symbol
Related ISO intent: P031 switch-state prohibition
Conforms to EN ISO 7010

Conforms to BS 5499 sign regulations
Materials: rigid plastic, self-adhesive vinyl, removable repositionable vinyl
Size options: H 100 x W 250 mm, H 150 x W 300 mm
Background colour: red and white
Text colour: white
Symbol colour: red
Shape: rectangle

Finish: glossy film surface
Non-photoluminescent
Non-reflective
Supplied as: single sign
Orientation: landscape
Fitting methods: wall, door or machine mounting
Display area: indoors and outdoors

ⓘ Installation Guidance

Fitting Advice for Do Not Switch On Signs

❌ Placement mistakes to avoid

❌ Do not fit the sign away from the switch it controls

❌ Do not place it where open doors can hide the message

❌ Do not mount it below normal sightline in busy workshops

❌ When this sign is not enough

❌ Do not rely on it as the only isolation control

❌ Do not use it for live electrical danger without warning signs

❌ Do not use damaged or dirty signs around machinery controls

✅ Better fitting choices

✅ Fit it directly beside the switch, isolator or control point

✅ Use the larger size where people approach from several metres away

✅ Clean and dry the surface before applying adhesive options

? Customers Questions

Do Not Switch On Prohibition Signs questions answered

What are Do Not Switch On Prohibition Signs used for? They are used to stop people energising machinery, switches or equipment when it must remain isolated, repaired or out of service.

Should I use this sign during lockout or maintenance work? Yes, it is useful beside isolators and controls, but it should support your isolation procedure rather than replace locks, permits or written controls.

Which material should I choose? Use rigid plastic for permanent wall or machine mounting, adhesive vinyl for smooth surfaces and repositionable vinyl where the instruction may need moving.

Where should the sign be fitted for best visibility? Fit it beside the actual switch, control or isolator, not across the room, so the instruction is seen before anyone can operate the equipment.

Does the pictogram match EN ISO 7010? The red prohibition symbol follows the EN ISO 7010 style. For exact switch-state pictogram applications, P031 is the relevant ISO reference.

✔ Features & Benefits

Do Not Switch On Signs Features and Practical Benefits

Features

✓ Clear “Do not switch on” instruction for fast recognition
✓ Red prohibition symbol supports visual understanding
✓ Landscape layout suits switchgear and machine fronts
✓ Choice of rigid, adhesive and repositionable materials

Benefits

✓ Helps prevent unexpected start-up during maintenance
✓ Gives contractors a visible instruction before they act
✓ Supports safer isolation routines without lengthy wording
✓ Lets you choose a fixing type that suits the surface

Switch isolation signs for safer control

For a portrait alternative, choose portrait switch-off prohibition signs where narrow equipment doors need a clearer fit. Useful beside isolators, panels and local controls.

When the hazard message needs extra force, compare danger do not switch on signs for maintenance during repairs or servicing. Helps reinforce that machinery must remain inactive.

If people are working nearby, add do not touch signs for work in progress at machinery controls. Good for engineering teams managing temporary safety restrictions.

For wider equipment stoppage, use do not operate landscape machinery signs where a machine must not be used at all. Suitable for faults, servicing and inspection holds.

To compare other machine control notices, visit prohibition signs for machinery control points before choosing a final layout. Helps you match wording to the exact site risk.

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