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Generator Automatic Transfer Switch is Crackling Sizzling and Arcing

Why does my automatic transfer switch makes a Loud ‘pop’ and there was also a visible flash?

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Generator Transfer Switch
Electrical Question: My automatic transfer switch makes a Loud ‘pop’ and there was also a visible flash.

There is a Loud ‘pop’ when automatic transfer switch opens or closes. Tonight, I realized that there was also a visible flash. is this normal and or acceptable?

This is a 16kw single phase standby generator with a 200 amp automatic transfer switch.

This electrical wiring question came from Jack, a Handyman in Virginia.

Jack, Thank You for Visiting Ask-the-Electrician!

Dave’s Reply:
Thanks for your electrical wiring question Jack.

Crackling or Sizzling from a Generator Transfer Switch

Application: Generator Transfer Switch.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrical Contractor, Certified Electrician or a authorized Generator Service Technician.
Electrical Tools Required: Basic Electricians Pouch Hand Tools, Voltage Tester, and appropriate Safety Gear.
Estimated Time: Depends on the personal level experience, ability to work with tools, install electrical circuit wiring, and the available access to the project area.
Electrical Safety: Identify the electrical power source to the Generator Transfer Switch, turn it OFF and Tag with a Note before working with the electrical wiring.
Electrical Wiring Parts and Materials: Electrical parts and materials for the Generator Transfer Switch should be approved for the specific project and compliant with local and national electrical codes.
Electrical Codes and Inspections: Installing or changing home electrical wiring should be done according to local and national electrical codes as adopted in Virginia. A permit and inspections may also be required.

Generator Transfer Switch is Crackling Sizzling and Arcing

This electrical wiring question is about a Generator Transfer Switch in the Driveway of an Old Home.

Generator Transfer Switch Crackling or Sizzling
Reviewing the Electrical Question:

200 AMP Automatic Transfer Switch
200 AMP Automatic Transfer Switch

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