Electrical Construction Activity
Safety Measures for GAS HAZARDS
- Cable Trays & Ladders will be
“as specified” type as per the approved material & standard submittal.
- All accessories used such as
“bends”, intersections, risers, reducers, elbows, etc. “used in cable trays
& ladders will be of the same manufacturer as that of the trays &
ladders.
- Prior to start any installation
of Trays & Ladders, a complete coordination will be carried out with other
mechanical services to avoid any interference or interrupted for the service.
The hazards to be communicated with all the working team members.
- Tray / ladders routes will be marking at the ceiling before start any fixing of these items.
- Each run of cable trays &
ladders will be completed before installation of any cables. Each run will be
aligned, leveled & securely fastened to the ceiling / wall. Ensure ladders
are properly secured at bottom & top.
- Supports will be provided to
prevent stern on cables entering or leaving tray. Cable trays extending through
partitions & walls will be protected by fireproof noncombustible barriers.
- Sharp edges, burns &
projection will be removed for fixing the trays & ladders approved
suspension rods or steel angle brackets will be used at spacing not exceeding
1.5 meter and generally as shown on the approved drawings. Joints will be
positioned as close as practicable to the tray / ladder supports. Ensure the usage
of cut resistant gloves and all other PPE as required for this activity.
- The fitting of trays & ladders such as tees, bends & crossings will be connected with radial to permit cable-bending standards.
- Minimum clearance of 250mm will
be maintained between top of tray & ceiling.
- Cable arrangement will be in one
layer only, evenly spaced, with minimum spacing of two diameters of he larger
of the two adjacent cables, or of a trefoil formation of single core cable
circuit.
- Cable trays will provide direct
support to the cables without cleats or saddles wherever practicable purpose
made straps, cleats or saddles will however be used to maintain a neat or
regular disposition of cables. In vertical tray installation or where trays not
directly support the cables, load bearing cable cleats or saddles will be
employed and securely fixed to the tray. Manufacturer’s recommendations will be
followed in selection of cable cleats or saddles, on the basis of individual application.
Ensure the fall protection PPE and its anchored properly.
- Earthing jumpers will be
installed on trays & ladders between the lengths and where required to
ensure effective electrical continuity irrespective of whether a separate protective
earth conductor is required or not. Ensure there is no material stored below
the activity area.
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