Confirm the test your insulated equipment needs.
DC dielectric testing: SFTI uses DC test equipment. Provide the manufacturer requirements and insulation rating so suitability can be confirmed before booking. Do not assume an AC-only test requirement can be fulfilled with DC testing.
Insulated equipment needs a test plan suited to its design, rating and manufacturer requirements. Share your equipment details before scheduling so SFTI can confirm the appropriate service and site arrangements.
- Equipment identification and insulation-rating review
- Pre-test condition review within the agreed scope
- High-voltage testing for applicable insulated aerial equipment
- Recorded test results for your equipment files
- Coordination with bucket truck and aerial device inspections when requested
Test method, voltage and acceptance criteria depend on the equipment and applicable manufacturer and test requirements. Availability for particular equipment or protective tools must be confirmed before scheduling.
What to send before scheduling
Provide equipment make, model, serial number, insulation rating, prior test records and any customer-specific requirements. Include your location, number of units and photos of data plates. SFTI will confirm access and work-area arrangements before the visit.
Service area
Request onsite service in Joliet, Morris, Chicagoland and throughout Illinois. Midwest and nationwide projects are available by request; travel and scheduling are confirmed for your location.
Common questions
What equipment can be tested?
SFTI offers dielectric testing for applicable insulated aerial equipment and selected electrical protective tools. Send the exact equipment or tool details so suitability and scope can be confirmed.
What documentation should I keep?
Keep the test results with the equipment identification, prior inspection records and maintenance history. SFTI provides documentation for the testing performed.
Can I request an aerial device inspection too?
Yes. Include both services in your request so SFTI can coordinate the inspection and testing scope for your equipment.

