UL1278 Figure 10.1 Cone Probe for Guarding of Heating Elements Test

The heating element and any part of the element assembly(such as an element support, sheath, and similar parts) shall be so guarded that flammable material as well as persons will be protected against contacting it.

To cone probe is conform to the UL1278 figure 10.1, The shape and size of an opening are such that a test gauge in the form of a right-circular cone having a base diameter of 2-3/4 inches (69.9 mm) and an altitude of 5-1/2 inches (139.7 mm), see Figure 10.1, is prevented from touching the heating element and the other high temperature parts when the cone probe is inserted,,apex first,in any manner.

Sherry Xu

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