The lowest electrical bid can conceal missing calculations, unclear shutdown responsibilities, weak testing evidence and an inadequate response plan after handover. By the end, you will have a way to verify credentials, compare like-for-like scopes, test technical capability and define the documents and service obligations your office requires.
Key takeaways
- Request the licence number, issuer, expiry date and permitted installation scope.
- Test experience against your building’s voltage, HVAC, backup power and occupancy constraints.
- Compare bids by inclusions, calculations, exclusions and responsibility—not headline price.
- Require commissioning results, test certificates, as-built drawings and usable maintenance records.
Verify the contractor before you compare prices
Do not compare prices until the contractor proves it can legally and safely work in your office. Request the electrical contractor licence showing the issuing authority, licence number, expiry date, permitted voltage and installation scope. “Class 1 electrical contractor” alone proves little: its design, installation and maintenance rights depend on the jurisdiction that issued it.
Request these named and current records:
- The licensed electrical supervisor responsible for the site, including licence category, attendance during testing and energisation, substitution rules, and emergency-call-out coverage.
- GST registration details matching the bidding company’s legal name and invoice entity.
- Insurance certificates for public liability, workers’ compensation and professional indemnity where design advice is included; check policy dates, limits and exclusions.
- Safety records, incident history, trained-person registers and references from occupied offices with comparable floor area and operating hours.
- A method statement that makes isolation the default and identifies lockout/tagout, test-before-touch, stored-energy control, barriers, permit ownership and re-energisation checks.
| Evidence | What it proves | What to verify |
|---|---|---|
| Licence schedule | Legal authority for the proposed work | Issuer, number, expiry, voltage and scope |
| Supervisor details | Licensed coverage beyond the company registration | Named person, site presence and replacement process |
| Insurance certificates | Financial protection after injury or property damage | Insured entity, limits, exclusions and validity |
| Office references | Experience in live corporate environments | Similar load, shutdown controls and client contact |
| Site verification plan | Ability to assess existing conditions | Drawings checked against maximum demand, fault current, earthing, voltage drop and spare capacity |
Reject a tender that supplies only a corporate licence, a generic risk assessment or old drawings. Existing diagrams do not prove the installation matches the building.
Test technical capability against the building
A credible contractor starts with a load study, not a panel quotation. Ask for the corporate office electrical load schedule showing connected load, maximum demand, diversity factors, HVAC starting current, data-room loads and planned growth. Compare those figures with transformer capacity, the landlord’s sanctioned supply, main-switchboard busbar rating and available fault level.
Require these technical submissions before appointment:
- A single-line diagram showing HT/LT distribution, protection settings, cable sizes, earthing and short-circuit ratings.
- A protection-coordination study proving discrimination between incomers, bus couplers and final circuits; request a harmonic assessment where large UPS systems, variable-speed drives or LED lighting create high neutral current.
- A standby-power study covering DG synchronisation, generator step loading, automatic transfer logic and the UPS redundancy requirement.
- Named licensed electrical supervisors, their licence categories, substitution arrangements and attendance during testing, energisation and emergency call-outs.
Ask how the contractor will verify performance under the building’s real operating conditions. A thermography report proves little if the survey uses lightly loaded equipment, incorrect emissivity or no temperature threshold; require minimum loading, reporting limits, access arrangements and follow-up tests for concealed defects.
Treat fire alarm, emergency lighting, smoke control, lifts, access control and building-management systems as interfaces. Require witnessed cause-and-effect tests and loss-of-normal-power tests with each system owner, not just an energisation certificate.
For a live, multi-tenant building, inspect the proposed shutdown, permit, access, fire-impairment and reinstatement plans. A technically correct installation still fails if it creates an unauthorised outage.
Compare bids through scope, calculations and exclusions
Compare bids only after making every contractor price the same electrical scope, design basis and risk. Issue one electrical scope schedule with quantities, connected loads, operating constraints, shutdown windows and required testing; require each bidder to return it with inclusions, exclusions and assumptions clearly marked.
| Item | Require in every bid | Low-price warning |
|---|---|---|
| Electrical design | Current single-line diagram, load schedule, maximum-demand calculation and voltage-drop calculation | “Design by contractor” with no figures or design responsibility |
| Cables and distribution | Cable specifications, installation method, derating factors, termination details and spare capacity | Smaller conductors, unspecified insulation or no allowance for future circuits |
| Protection | Fault-current calculation, device ratings, settings and protection coordination study | Breakers priced without discrimination or short-circuit verification |
| Testing and access | Test instruments, certificates, permits, shutdown plan and out-of-hours labour | Testing, energisation or weekend work listed as extras |
| Commercial scope | Quantities, provisional sums, variation rates and every exclusion | A low total built on omitted panels, containment, lifting, fire-stopping or reinstatement |
Ask bidders to verify the existing installation rather than trusting old drawings. Their submission should state the earthing arrangement, protective-device settings, prospective fault current, phase balance, neutral loading, transformer and switchboard capacity, UPS or generator interfaces, and available spare capacity.
Reject a bid that reports only “pass” or hides these checks behind a provisional sum. Require measured values and acceptance criteria for applicable insulation resistance, continuity, polarity, earth-fault-loop and protective-device tests. Compare the adjusted totals after adding every exclusion and provisional sum; the lowest compliant price is the meaningful low bid.
Assign responsibility from design through occupied-office work
The contract must name one accountable party for every stage; otherwise a failed circuit becomes an argument between the design consultant versus electrical contractor. The buyer, not the contractor, should approve the responsibility matrix before work begins.
- Design: identify who owns load calculations, short-circuit and protection studies, single-line diagrams, coordination with HVAC, UPS, fire alarm and lifts, and all design changes. If the electrical contractor designs the installation, name its licensed electrical person and require sealed drawings where the authority demands them.
- Installation and temporary works: assign the contractor responsibility for materials, supports, temporary power, protection of occupied areas, housekeeping and reinstatement of ceilings, fire compartments and shared risers.
- Isolation and shutdowns: make the contractor prepare the equipment-specific method statement, permit-to-work, shutdown notice and tenant communication. The plan must use de-energisation as the default, with lockout tagout, test-before-touch, stored-energy control, barriers and documented re-energisation checks.
- Testing and energisation: state whether the contractor or an independent electrical testing agency arranges inspections, test instruments, reports, statutory submissions and corrective work. Name who may authorise energisation and who signs the energisation checklist.
- Handover and defects: define the defects-liability period, response times, emergency attendance and permanent-repair obligations. A facility-management SLA must separate acknowledgement, attendance, diagnosis, temporary risk reduction and restoration; “four-hour response” does not guarantee restored power.
Whether the bidder is Navyashree Engineers Private Limited or another firm, require named supervisors, substitution rules and licensed coverage during testing, energisation and call-outs. Exclude landlord and utility equipment explicitly, or assign their isolation and repair interfaces in writing.
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Demand measurable commissioning evidence and usable handover records
Do not accept “tested and passed” as commissioning evidence. Require results that identify each circuit or asset, the test method, instrument and calibration status, acceptance criterion, tester, date and measured value.
1. Match the final marked-up single-line diagram to site labels, panel schedules, cable and circuit IDs, protective-device ratings and settings. Record spare capacity, phase balance, maximum demand and any changes made during installation.
2. Require an insulation resistance test for each applicable circuit, with test voltage and measured megohms; continuity, polarity and earth-fault-loop results; and an earth resistance reading that states the test location and method. A pass-only schedule is not evidence.
3. Demand breaker injection test reports showing injected current, trip time, phase or pole tested, and comparison with the approved setting. Obtain residual-current-device trip results where fitted, plus a thermographic scan report identifying equipment, load conditions, images, temperature differences and defects requiring correction.
4. Obtain energisation approvals, statutory certificates, approved shutdown and permit records, and a dated defects register showing owner, severity, due date and closure evidence. Do not accept open safety-critical defects.
The handover package should be searchable and editable in the agreed digital format, not a box of drawings. Require the final single-line diagram, equipment manuals, asset IDs, protection settings, warranty dates, preventive-maintenance tasks, spare-parts list, software or configuration backups and emergency isolation instructions.
Have your facilities team witness demonstrations of shutdowns, alarms, controls and reset procedures before acceptance.
Frequently asked questions
What should you verify before comparing electrical contractor prices?
Request the contractor’s electrical licence showing the issuing authority, licence number, expiry date, permitted voltage and installation scope. Confirm that the licence covers the work and jurisdiction for your office.
How do you test an electrical contractor’s technical capability?
Match the contractor’s experience and proposed team to your building’s HT/LT systems, HVAC loads, backup power, protection systems and occupied-office constraints.
How should corporate offices compare electrical contractor bids?
Compare each bid through its scope, load calculations, drawings, inclusions, exclusions, assumptions, equipment specifications and responsibility for overlooked work.
What commissioning and handover records should an office owner demand?
Require measurable commissioning evidence, test results, certificates, approved drawings, equipment schedules, operating instructions, maintenance requirements and records that facilities staff can use.
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