Electrified Overhead Cable Ahead Warning Sign – Diagram 779 | Permanent UK Traffic Sign

Electrified Overhead Cable Ahead Warning Sign – Diagram 779 | Permanent UK Traffic Sign

The Electrified Overhead Cable Ahead Warning Sign – Diagram 779 is a vital safety sign used on UK roads to warn drivers of electrified overhead lines—commonly found near railway bridges, tram systems, or construction sites involving high-voltage cables. This clear visual alert is crucial for protecting high-sided vehicles from accidental contact and ensuring compliance with safe clearance heights.

Compliant with TSRGD Diagram 779 and manufactured in accordance with BS EN 12899-1 and Chapter 4 of the Traffic Signs Manual, this triangular sign features a bold lightning bolt icon beneath a stylised overhead cable. It is designed for maximum visibility and safety, especially in locations with limited clearance or hidden hazards.

Constructed from high-durability aluminium, composite material, or self-adhesive vinyl, and finished in RA2 or R3B reflective sheeting for excellent visibility in all conditions. Available in all six UK-standard triangle sizes (450mm to 1500mm) and supplied with a choice of channel fixing rails, plate-only backing, or adhesive formats for permanent or temporary installation.

🔧 Technical Review

Diagram 779 features a high-voltage lightning bolt icon and an overhead cable symbol, instantly conveying the presence of live wires above the carriageway. This warning sign is especially important on routes used by tall vehicles, heavy goods traffic, or construction machinery. It ensures compliance with site safety standards and provides essential driver warnings near electrified infrastructure.

✅ Why Choose Morelock for Your Diagram 779 Sign?

✔️ Fully compliant with TSRGD Diagram 779, BS EN 12899-1, and Chapter 8
✔️ Manufactured using RA2 or R3B reflective sheeting
✔️ Durable construction in aluminium, composite, or sticker format
✔️ Supplied in 450mm to 1500mm triangle sizes
✔️ Flexible mounting: channel rail, plate-only, or adhesive
✔️ UK-manufactured and dispatched quickly from Morelock

📌 Ideal For:

• Roads with low-clearance railway or tram bridges
• Industrial sites with overhead power lines
• Routes commonly used by tall vehicles or plant machinery
• Infrastructure with electrified gantries or cranes
• Areas requiring enhanced driver awareness of overhead hazards

🌟 Summary (Why You Should Buy This Product)

• ✅ Official UK traffic sign for overhead electric hazard warnings
• ✅ Designed for high-risk clearance and infrastructure zones
• ✅ Compliant, reflective, and available in all standard sizes
• ✅ Strong and weather-resistant build, made in the UK
• ✅ Fast turnaround and delivery directly from manufacturer

📊 Product Specifications Table

🔗 Useful Road Sign Resources