What the type of cable joint (MV) that should be used in Hazardous Location Class I ?

Of course it's better to be cold shrinkable joint, like 3M.

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For hazardous areas it is better to have cold cable joints. However if hot work permit can be issued then hot shrinkable can be used.

The reputed vendors are - 3M, Raychem, Taihan- korea, LS- korea, Pfisterer etc.

 rigid, highly impenetrable type of cable