What is required where grounding conductors enter an auxilary gutter without threaded hubs or bosses and are #4 and larger and are not securly fastened in place? I – insulating type bushing II – the temperature rating of the conductors must exceed that

What is required where grounding conductors enter an auxilary gutter without threaded hubs or bosses and are #4 and larger and are not securly fastened in place? I – insulating type bushing II – the temperature rating of the conductors must exceed that