Over the surface of the insulator and through air to the edges of the insulator.ġ2.2 Insulating material used as specified in 12.1 shall comply with the following requirements:ġ) An insulating material described in Table 12.1 orĢ) Tubing or sleeving complying with 29.2.3 and rated for the voltage involved ī) The material is able to be in direct contact with uninsulated live parts andĬ) The material does not serve to physically support or maintain the position of an uninsulated live part.Įxception: A material that does not comply with 12.2 shall be investigated as an insulating barrier inĪccordance with the requirements in the Standard for Industrial Control Equipment, UL 508.ġ3.1 An insulating material that is used for the direct support of an uninsulated live part, such as a standoff or insulating base for a bus bar, current shunt, or terminal, shall comply with 13.2. Through air spacings, or both, the required spacings in Section 10, Spacings, shall be applied by tracing Buy Standoff Insulators | Buy Multi Wire Lugs | View Standoff Catalogġ2.1 When an insulating material is used as a barrier in order to comply with the required over surface or

Ul 508 vs ul 508a