Service 10 / 15
LOOP
IMPEDANCE
Complete loop impedance testing services — from earth fault loop path verification to prospective fault current measurement and system protection coordination.
Overview
Verify Fault
Paths — Precisely.
Loop Impedance Testing measures the total impedance of the earth fault loop path — ensuring protective devices operate within the required disconnection times and that the installation is safe under fault conditions.
Our engineers perform loop impedance tests on final circuits, distribution boards, and main intake panels, verifying compliance with BS 7671 and IEC 60364 requirements.
Results are recorded, analysed, and compared against design limits — with clear recommendations for any remedial actions required.
Scope of Work
What We Deliver
Earth Fault Loop Path
Verification of the complete earth fault loop path impedance from source to point of fault.
Prospective Fault Current
Measurement of PFC and PSCC to verify protective device ratings and breaking capacity.
Circuit Verification
Testing of final circuits, sub-mains, and distribution boards for disconnection time compliance.
Results Analysis
Comparison of measured values against BS 7671 limits and design specifications.
Documentation
Complete test schedules, results tables, and compliance certificates.
Remedial Recommendations
Clear guidance on any circuits requiring improvement or corrective action.
Why This Service
Tested
with Precision.
⚡
Safety Critical Testing
Ensures protective devices disconnect faults within required times.
📋
BS 7671 Compliance
All testing performed to current UK wiring regulations.
✅
Clear Reporting
Detailed results with pass/fail status and remedial actions.
Our Process
How We Deliver
Survey
Identify circuits and test points.
Test
Measure loop impedance values.
Analyse
Compare against limits.
Report
Issue compliance documentation.
Get a Quote
Need Loop Impedance Testing?
Share your testing requirements and our team will respond with a tailored plan within 24 hours.
Other Services
Explore More Services
01
Oil & Gas E&I Installation
Onshore & offshore oil & gas facilities E/I installation & commissioning.
10
E&I Commissioning
Complete electrical & instrumentation commissioning services.
15
Loop Testing
Comprehensive loop folder administration & loop testing.