Wednesday 8 May 2019

Contractor’s Supervisor


Contractor’s Supervisor Personnel understands the owner/ Consultant HSE policy requirements and implement:
supervisor

• Organize work to the required safety standards to prevent injuries, damage to property and environment.
• Ensure all persons have undergone safety induction training before engaging the on the job.
• Prepare and implement only safe and approved work methods, instruct and ensure compliance by work force.
• Enforce and comply with all work permit procedures.
   Prior to assigning the days task inspect the work site, correct unsafe conditions if any and report to site management to prevent recurrence.
• Prepare Safe Plan of Action (SPA) and communicate the same to his workforce.
• Communicate and ensure all identified hazards and preventive measures related to the task are understood by the workforce.
• Ensure all required safety resources are available and in good condition.
• Inspect all scaffold, elevated platforms, fall and fire preventive/protective equipments involved in the task,
• Inspect all tools and equipments, safety guards, instruments are in good operating conditions.
• Ensure required Personal Protective Equipments are available.
• Plan and ensure a good housekeeping.
• Monitor and control the task for unsafe acts and conditions.
• Co ordinate task with other activities in the job site.
• Ensure awareness of Emergency procedures, First aid, Fire fighting etc among the workforce.
• Cooperate and implement instructions from Safety and Fire departments.

Saturday 4 May 2019

Earthing strip size and fault level typical


EQUIPMENT EARTHING
All the equipment should be grounded with double run earth strip directly connected to earth mat at two different points.  The table provides the guidelines for Selection of Cross section of Earth conductor as per IEEE 80-2000 Clause 11.3.1 Equation 37 & Mild Steel as an Earth Conductor.
earthing strip size

Sr.
Fault current Level (KA)
Minimum Required Area of Cross Section (Sq.mm)
1
5
54
2
10
108
3
15
163
4
20
217
5
25
271
6
30
325
7
35
379
8
40
433

For various Equipments such as Power Transformer, Station Transformer, 11 KV Switch gear, 415V Panel, Light panel, Junction box, Street Lighting pole, Metallic fence, Isolator, Gantry tower & Electronic Earthing different cross sections of Earth conductor shall be selected as per the fault level. For switch gear rooms, a local earth conductor of adequate size of G.I flat may be run around the room below floor level to facilitate earthing of equipments in switchgear room.

One Nation, One electrical License

Electrical contractors are facing license problem when they bid for another state. Generally they are entitled to do work in particular stat...