Thunderstorm activity can increase during seasonal transitions, and in parts of the Southeast—including Florida—storms may occur almost daily between May and September. Lightning and other utility-system events can expose church facilities to transient surges. Although no recommendations can guarantee that damage will never occur, reviewing facility wiring and adding appropriate surge protection can help reduce risk.

Safety First

Some recommendations involve inspecting electrical panels or installing surge protection. These tasks must be performed by a licensed, qualified electrical contractor—not a church volunteer. Facilities with 277/480-volt three-phase service require particular care because arc-flash incidents can cause severe injury or death.

• Use the required protective equipment, including gloves, face shields and protective clothing.
• Have the contractor de-energize and lock out panels and control equipment before inspection or installation whenever applicable.
• Use a contractor familiar with the additional precautions required for 277/480-volt equipment.
• Label electrical panels to warn unauthorized personnel to keep out.

Single-Phase vs. Three-Phase Service

Small churches may have single-phase (split-phase) service with two energized conductors and a neutral. Medium and large churches commonly have three-phase service, with three energized conductors and a neutral.

During utility maintenance, vehicle accidents, storms or other system events, one phase of a three-phase service may become de-energized. Three-phase pumps, motors and HVAC or refrigeration compressors that continue to operate during a loss-of-phase event may be damaged or destroyed.

Recommended checks

• Have an electrician inspect three-phase pumps, motors and HVAC/refrigeration compressors to verify that loss-of-phase protection is installed and working.
• Confirm that HVAC and refrigeration compressors have a restart time-delay device. The source white paper recommends a delay of 3–5 minutes to allow refrigerant pressure to bleed down after an interruption.
• Ask a qualified electrician or refrigeration technician to confirm that protection modules and time delays are operational.

Variable-Speed Drives

Some newer facilities use variable-speed or variable-frequency drives for domestic water and HVAC systems. Contact the equipment manufacturer to determine whether a “ride-through kit” is available. These kits may include inductive chokes installed at the drive’s power feed to help equipment ride through momentary interruptions without blowing a drive fuse or module.

If the manufacturer offers a suitable ride-through kit and one is not installed, consider having a qualified professional evaluate installation for applicable drive motors and compressors.

Battery Backup Systems

Momentary interruptions, sometimes called “blinks,” can occur during storms or on otherwise clear days. They may be caused by utility reclosers—automatic resetting circuit breakers responding to events such as a vehicle striking a pole, a tree branch contacting a line or a lightning strike.

Consider these backup-power measures for important church systems:

1. Install a properly sized medium-to-large UPS for the main computer/server, providing at least 5–10 minutes of backup to save files and shut down safely.
2. Use smaller UPS units for important computer-support equipment located away from the main server.
3. Consider backup power for audio/visual control consoles and televisions so they can remain operational during a service.
4. Test backup units monthly and replace internal batteries according to the manufacturer’s instructions. The original white paper suggests every two years.

Grounding

Proper grounding is important, but adding ground rods is rarely the best first response to power or surge problems. The source white paper discusses the grounding requirements in the National Electrical Code and recommends that a qualified electrician inspect the existing system before making changes.

Grounding inspection checklist

1. Have a qualified electrician verify the grounding system at the main electrical service entrance. Ground rods may be concealed beneath concrete; an electrician can determine an appropriate way to verify the system.
2. Inspect the soil around ground rods for persistent wet or “swampy” conditions. A leaking hose bib or air-conditioning condensate drain can saturate the soil and affect local grounding conditions.
3. Verify that incoming utilities—power, cable and telephone—are bonded together at the service entrance. Avoid separate, unbonded grounding systems for these utilities.
4. Ask the electrician to evaluate bonding of metal fencing so surge energy has an appropriate path to earth rather than jumping toward facility equipment.
5. Inspect the church steeple’s lightning-protection system, if present, and confirm that its conductors are properly connected and grounded.

The original white paper describes a church experiencing repeated audio/visual system failures. A follow-up inspection found a disconnected braided grounding conductor from the steeple lightning rod, with arcing and burn marks near the metal building structure.

Electrical Panel Inspection

The neutral and safety-ground conductors are typically bonded at the service entrance. Additional neutral-to-ground bonds in downstream panels can allow operating current to flow on safety-ground conductors and may contribute to touch-voltage concerns or equipment damage.

Ask a qualified electrical contractor to inspect each panel and subpanel and confirm that:

• Bare copper grounding conductors terminate on the grounding bar bonded to the panel enclosure as required.
• White neutral conductors terminate on the neutral bar. In subpanels, the neutral bar must remain isolated (“floating”) from the panel enclosure where required.
• Any improper neutral/ground mixing or bonding is corrected before surge protection is installed.
• Panels have suitable “Keep Out” warnings for unauthorized personnel.
• Coaxial cable and telephone demarcation points are bonded at the electrical service entrance.

The source also recommends evaluating cable grounding blocks and telephone demarcations, including whether cable connections should be upgraded to units with built-in surge protection.

Surge Protection

Appropriate surge protection can provide a path for transient surge energy to dissipate rather than travel through sensitive equipment and controls. Correct device selection depends on the actual electrical service and measured panel voltages.

Confirm the electrical service voltage

Have the electrical contractor document phase-to-phase and phase-to-neutral readings for each panel. The table below reproduces the nominal voltage relationships presented in the original white paper.

Important: The source document notes that voltage may vary by approximately ±5% and instructs readers to stop if readings are outside expected values or if any leg measures zero. Have the electrician investigate abnormal readings and select surge protectors rated for the actual service voltage.

Recommended surge-protection review

1. Build a list of electrical panels and document their verified service voltages.
2. Evaluate an appropriately rated hard-wired surge protective device at each circuit-breaker panel.
3. Evaluate protection for circuits serving outdoor or parking-lot lighting and outdoor street signs.
4. Review circuits supplying other equipment located outside the main church building.
5. Audit 120-volt duplex receptacles, recording their locations and connected equipment. Consider quality multi-stage surge protection for critical devices.
6. At cable and telephone entry points, consider quality plug-in surge protection with the appropriate coaxial and telephone protection modules.

Next Steps

Use this guide as a starting point for a facility review with a licensed electrical contractor. Every church has different equipment, service voltages and site conditions, so grounding and surge-protection choices should be based on an on-site assessment and applicable codes.