UL 1278 Figure 10.2 Bar Probe

UL 1278 Figure 10.2 Bar Probe is a precision-engineered safety compliance instrument designed for verifying the inaccessibility of hazardous components in electric room heaters according to UL Standard 1278 requirements. This specialized test tool features a hardened steel probe section that maintains dimensional stability through repeated testing cycles, ensuring consistent simulation of accidental user contact scenarios.

The instrument incorporates an insulating nylon handle with non-slip ergonomic design, providing safe operator handling during compliance verification procedures. Precision-machined to UL 1278 Figure 10.2 dimensional specifications, the probe sections measure 1/16 inch (1.6 mm) and 1/2 inch (12.7 mm) diameters respectively, enabling accurate assessment of potential access points in heater enclosures.

Technical Specifications:

• Compliance Standard: UL 1278 Figure 10.2 for electric room heater safety testing
• Probe Construction: Hardened steel bar (maintains dimensional integrity, resists deformation)
• Handle Material: Insulating nylon (heat-resistant, non-conductive, ergonomic grip)
• Critical Dimensions:
  • Probe Section 1: 1/16 inch (1.6 mm) diameter
  • Probe Section 2: 1/2 inch (12.7 mm) diameter
• Primary Function: Verification of hazardous component inaccessibility (hot elements, moving parts) in electric room heaters
• Applied Force Protocol: Minimal force application (simulates accidental user contact conditions)

Standardized Test Procedure:

1. Conduct visual inspection of probe assembly for mechanical integrity (verify straightness of steel bar, absence of handle cracks)
2. Energize electric room heater unit and allow stabilization at normal operating temperature
3. Position probe using insulated handle, aligning steel bar with potential access apertures (grilles, ventilation openings, enclosure gaps)
4. Apply minimal guidance force to simulate accidental contact scenarios
5. Document probe contact/non-contact with hazardous components
6. Record compliance assessment results (pass/fail determination)

Application Scope:

• Safety compliance testing of portable electric space heaters (UL 1278 Figure 10.2 protocol)
• Accessibility verification for wall-mounted electric room heaters (hazardous component isolation assessment)
• Ceiling-mounted electric heater safety evaluation (commercial and industrial installations)