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In a busbar arrangement for a switchgear assembly where the load buses pass through apertures in riser supply buses the load buses are supported by the supply buses by insulating grommet blocks occupying the space between the load buses and the inner edges of the apertures. The grommet blocks are he

In a busbar arrangement for a switchgear assembly where the load buses pass through apertures in riser supply buses the load buses are supported by the supply buses by insulating grommet blocks occupying the space between the load buses and the inner edges of the apertures. The grommet blocks are held in place by sleeves on the load buses.

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In a switchgear assembly, a plurality of supply riser buses, a plurality of load buses passing through apertures in said riser buses, means to support said load buses in said apertures comprising a plurality of pairs of insulating grommet blocks shaped to conform to and engage the inner edges of sai

In a switchgear assembly, a plurality of supply riser buses, a plurality of load buses passing through apertures in said riser buses, means to support said load buses in said apertures comprising a plurality of pairs of insulating grommet blocks shaped to conform to and engage the inner edges of said apertures, each pair of grommet blocks being seated in a respective aperture and defining, by their inner surfaces, an inner aperture having dimensions greater than the dimensions of an individual load bus, insulating sleeves on said load buses surrounding said load buses where they pass through said apertures and essentially completely filling the spaces between the load buses and said inner apertures.