Based on guidelines from the British Safety Council, Solar Energy UK, and associated health and safety regulatory frameworks, safety in solar plant construction and operation focuses on mitigating risks associated with working at heights, electrical hazards, and site-specific hazards.

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Based on guidelines from the British Safety Council, Solar Energy UK, and associated health and safety regulatory frameworks, safety in solar plant construction and operation focuses on mitigating risks associated with working at heights, electrical hazards, and site-specific hazards. 

Key safety requirements and best practices for solar plants include:

1. Working at Heights and Structural Safety 

Edge Protection: Scaffolding with proper edge protection (double guard-rails and toe-boards) is required for roof work, extending 2 meters beyond the work area.

Fragile Roofs: No walking directly on unprotected, fragile surfaces (e.g., fiber cement sheets, skylights).

Load Assessment: The roof must be assessed to ensure it can support the weight of panels, equipment, and personnel.

Ladders: Use of ladders should be for low-risk, short-duration tasks, with a preference for stairs or MEWPs (Mobile Elevating Work Platforms) where possible. 

2. Electrical Safety (DC and AC)

Safe Isolation: Effective, documented LOTO (Lock-Out-Tag-Out) systems must be in place to ensure circuits are not unintentionally energized.

Voltage Testing: Assume all wires and contacts are live until tested and confirmed dead.

Connector Safety: MC4-type connectors (IP68) should be used, ensuring they are touch-proof.

Arc-Flash Protection: Specialized gear and procedures for working on energized circuits.

Compliance: Systems must comply with BS 7671 (IET Wiring Regulations). 

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3. Fire Safety and Prevention

Cable Management: Proper management to prevent damage, arcing, and fire.

Heat Dissipation: Ensure inverters and panels have adequate ventilation.

Site Layout: Fire-resistant coating and firebreaks, especially during summer months.

Battery Energy Storage Systems (BESS): Special care regarding thermal runaway in lithium-ion batteries. 

4. Operational & Environmental Health

Competence: All personnel must be trained for their specific task and aware of the hazards of solar farms.

PPE: Use of arc-flash-rated gear, insulated gloves, and sun protection.

Terrain & Wildlife: Management of slips, trips, and falls on uneven ground, along with risks from wildlife damage.

Weather Monitoring: Halt work during high winds, lightning, or extreme temperatures.

5. Regulatory Compliance

MCS Certification: Installations should be carried out by Microgeneration Certification Scheme (MCS) certified installers to ensure compliance with quality and safety standards.

CDM Regulations: Compliance with Construction (Design and Management) Regulations is essential for construction-phase safety.