Commissioning a borewell pump without earthing, backflow protection or a completed trial
A crew is commissioning a 7.5 hp 3-phase submersible pump in a 60 m borewell serving a 1.5 ha drip block in Balasore district. The control panel is fixed on a steel pole at the field edge: there is no earth pit, no ELCB, and the cable joint about 3 m above the pump is taped rather than heat-shrink potted. The pump was lowered with a tractor and a nylon rope, with a 17-year-old relative of the farmer standing in the sump guiding the cable. The chemigation point is 10 m from a dug well used for drinking water; there is no non-return valve on the injector line. Bottles of acid and chlorine are stored uncapped beside the panel, and the farmer's children play in the field. The pipeline pressure test has not been done and the 24-hour trial run has not started. The farmer wants the completion certificate signed today because the subsidy inspection is tomorrow, and asks the technician to "adjust" the water meter so that the recorded discharge matches the design figure.
1. List the hazards you would stop work for, in priority order, and the control for each.
Read the worked answer
1. Electrical (highest priority - potentially fatal)
- No earth pit and no ELCB on a 3-phase 7.5 hp installation: a fault can energise the panel, the wet field and the pipeline. Stop work; install a proper earth electrode with measured resistance, an ELCB/RCCB of appropriate rating, and a locked, weatherproof panel with a main isolator.
- Taped cable joint: a taped joint is not watertight and will fail in the water column. Raise the pump, make a proper heat-shrink/potted joint, and test insulation resistance before lowering again.
- Only a qualified electrician makes the final connection; use a lock-out/tag-out before touching the panel.
2. Lifting and suspended loads Lowering a 60 m pump string with a tractor and nylon rope, with a person in the sump, risks crushing and falling. Use rated clamps and a proper tripod or crane, exclude everyone from under the load, and keep hands off the pipe string as it goes down.
3. Confined/ wet space entry A person standing in the sump near a live pump is the classic electrocution scenario. No worker in the sump while the pump is being lowered or the panel is connected.
4. Young worker A 17-year-old is a child under Indian labour law and must not be given hazardous work on an electrical or lifting operation. Remove him from the work area, explain to the farmer, and record it.
5. Chemical and backflow Uncapped acid and chlorine beside a live panel, and no non-return valve 10 m from a drinking-water well, are both stop-work items.
Do not restart until items 1–3 are corrected; document the stoppage in writing to the farmer.
2. What are the consequences of signing the certificate now and of adjusting the meter reading, and how do you handle the farmer?
Read the worked answer
Signing before the pressure test and trial
- The certificate is a professional attestation that the system is installed per the approved design and has passed testing. Signing in advance transfers liability for every defect to the technician.
- If the pipeline fails the pressure test after certification, or the pump discharge is below design because of a wrong duty point or a damaged cable joint, the dispute is now about who pays - and the signature and the adjusted meter reading make the technician's position indefensible.
- The farmer's subsidy is also at risk: if the inspection finds the system not working, the claim can be held or recovered, and the certificate becomes evidence of a false declaration.
Adjusting the meter
- That is falsification of a commissioning record, and it may become part of a subsidy or loan file. It can lead to cancellation of registration, recovery with penalty and prosecution. Refuse.
How to handle the farmer
- Acknowledge the deadline and offer a practical route: run the pressure test and a shortened but valid trial today (full 24-hour run to follow) with the electrician present, record real readings, and issue a certificate for what has genuinely been completed.
- Tell him the inspection is more likely to pass with gauges, earthing, an ELCB and a backflow preventer in place, even if that takes a day.
- Send a short written note listing what was found, what was corrected and what remains, so the officer sees a documented process.
- Record the true meter reading and explain the difference between measured and design discharge - often a wrong duty point or excessive head, which is a design issue to fix, not to hide.
- If the farmer insists, the correct step is to withdraw from certification and refer the matter to the department rather than sign something untrue.
3. What environmental and legal protections apply to the chemical store and the chemigation point, and what is the technician's duty regarding the 17-year-old?
Read the worked answer
Chemical store and chemigation
- Install a non-return valve, vacuum relief valve and check valve so fertilizer or acid cannot siphon back into the line and the aquifer. The chemigation point should be as far as practicable from the drinking-water well, and never downstream of a connection to a potable supply.
- Store acid and chlorine in the original labelled containers, sealed, on a bunded shelf away from the panel and out of reach of children; keep a spill kit, sand and clean water available; post the first-aid and emergency numbers.
- Never store acid and chlorine together, never transfer them into unlabelled bottles, and never leave them beside an electrical panel where a leak or spark can cause a dangerous reaction.
- Dispose of rinsate and flush water away from the well, watercourses and the field drain used for drinking-water recharge; follow the label instructions for the specific product.
- Fence the panel and pump head, keep the field drains clear, and prevent fertilizer runoff into the nearby water body.
The 17-year-old helper
- Under Indian labour law a person below 18 is a child and cannot be employed in hazardous work such as electrical installation, lifting operations or work in a sump. The technician's duty is to stop it immediately, not to rely on the farmer's permission.
- Explain the risk to the farmer, keep the young person out of the work area, and use trained adult labour.
- Record the instruction in the job file. If the farmer insists, refuse to continue with the hazardous work and, where required, report it through the appropriate channel.
- Use the same visit to train the adult workers and the farmer's family on electrical safety, chemical handling and the emergency switch-off.