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The UL486A-B Standard covers Insulated connectors for voltages of  600 volts or less (1000 volts in a sign or luminaire), for general use.  

Standard covers uninsulated connectors up to 2000 volts nominal (US & Mexico), or phase to phase (Canada), for general use.

Standard covers uninsulated connectors up to 5000 volts phase to phase (Canada) where allowed, and if installed in accordance with Section 36 of the Canadian Electrical Code, Part 1, C22.1.

Standard covers uninsulated connectors for voltages of 35,000 volts or less in equipment rated for 35,000 volts or less, where allowed.

Other standards apply to any installation – this information applies only to UL486A-B standard. 

The purchaser is responsible for conforming to all relevant standards appropriate for the installation.