Defined term
Insulation resistance test
An insulation resistance test checks a PV circuit for an abnormal leakage path to ground.
technology · Concept code GS-CONCEPT-237 · Last verified August 28, 2026
Evidence through 2015-10-01 · 0 sources have no source-event date
Content modified 2026-08-28
Definition and decision context
Definition
An insulation resistance test checks a PV circuit for an abnormal leakage path to ground.
Verified August 28, 2026
Why it matters
Its interpretation depends on the circuit, environment, tools, and qualified field personnel rather than a universal threshold or homeowner procedure.
Verified August 28, 2026
Selector-derived public graph
Learning navigation
Primary topic: Maintenance
Broader topic
No public concepts recorded.
More specific topics
No public concepts recorded.
Related topics
No public concepts recorded.
Learn first
No public concepts recorded.
Builds toward
No public concepts recorded.
Primary sources
- National Renewable Energy Laboratory: NREL/SR-5D00-65050, Field Guide for Testing Existing PV Systems for Ground Faults, § 3.1 Insulation Testing Procedure, report p. 9
Revision NREL/SR-5D00-65050 · Source event as of October 1, 2015 · Ontology accessed August 28, 2026 · Ontology verified August 28, 2026
- National Renewable Energy Laboratory: NREL/SR-5D00-65050, Field Guide for Testing Existing PV Systems for Ground Faults, § 3.1 and § 4, report pp. 9 and 12
Revision NREL/SR-5D00-65050 · Source event as of October 1, 2015 · Ontology accessed August 28, 2026 · Ontology verified August 28, 2026