"Weather Threat that Affects Most People, in Most Regions, Most of the Time" (LPI)
SunPowerByCriste LLC
Lightning Protection The Villages 32159 32162 32163 & Area
Ground Resistance Testing
Surge Protectors
Lightning Protection System Design & Installation
Lightning Protection Certification and Inspection
Ground Resistance Inspection & Test
CALL NOW FOR INSPECTION AND TEST - (352)775-8352
Schedule your periodic Ground-Resistance inspection and test NOW to maintain your Lightning Protection System integrity.
Certified Inspector #3044 - Lightning Protection Institute
What is ground resistance?
Ground resistance describes the path that conducts electrical currents (often more than 30,000 Amps) to ground when lightning strikes occur.
Why is ground resistance important?
If lightning strikes, your system of lightning rods and cables carry harmful electrical currents from your home to ground safely if the path is low-resistance.
What happens if ground resistance is high?
High resistance can produce a voltage high enough to spark across to nearby plumbing, electrical wiring, etc causing massive heat damage or fire. It also can result in strong electromagnetic fields that can result in damage or destroy electronic equipment.
What should the value of ground resistance be?
Ground resistance can range from a few 10s of ohms to a few 100s of ohms. Most Lightning Protection standards recommend that ground resistance be less than 50 ohms. However, values of 5 ohms or less are easily achieved and are desirable.
What should I do if ground resistance value is high?
Consult a qualified LPI or UL certified Lightning Protection System installer for advice and suggested remedial action.
Does ground resistance of my system change over time?
Changing soil conditions as well as loose connections, corrosion and other factors may dramatically increase ground resistance. Periodic testing is recommended to maintain system integrity,
References
-- Lightning Protection Institute (LPI) Standard #175
-- National Fire Protection Assoc. (NFPA) Document #780
-- Underwriters’ Laboratories, Inc. (U/L) Standard #96A
-- EARTHING & LIGHTNING PROTECTION SYSTEMS, D001-TEST-051 ISSUE, ...1 March 2017
-- Protect Your Home Electronics from Lightning, John N. West, Sr., Power & ...Systems Innovations of Tampa, December 2002