The cylinder manifold installation, the Vaporiser installation and the downstream installation shall be earthed at two places. Two earth pits as per IS 3043, shall be provided and the earthing resistance should not exceed 1Ω. The system should be tested for electrical continuity and resistance to earth.

Copper jumpers shall be provided at flange.

Only flameproof electrical fittings approved by statutory authority shall be used in the area segregated for LOT installation. These shall be earthed at two points

The earthing resistance shall be checked twice a year once during the summer season and once during winter and records for same shall be maintained.