44
4 . eq u I p m eN T I N s Ta L L aT I o N
—
Fig. 4.21
Indoor equipment
weld anchoring
—
Fig. 4.22
Spectra series* busway
mounting (front-entry)
Busway connections
Busway runs must be aligned with openings
in the equipment and connected to the mating
components electrically and mechanically.
A collar is mounted on the top of the equipment
cable compartment to which is bolted the busway
housing. See Fig. 4.22. The 1/4-20 NC bolts,
washers, and nuts for this mechanical connection
are supplied with the busway stub. The bolts
should be tightened with a torque of 7-9 ft-lbs.
The power conductors in the busway stub are
designed to bolt directly to power connector
blocks mounted on the switchgear riser bus bars.
These connections are made with 1/2-13 NC bolts
supplied with the switchgear equipment.
Note: To maintain the minimum contact
resistance across bolted bus joints, it is
recommended that the joint contact
surfaces be coated with a film of lubricating
grease. A can of this grease is supplied with
the equipment. Do not put grease on the
bolt threads as this will affect the clamping
force exerted by the bolt.
Remarque: Pour conserver larésistance
de contact minimale sur les raccordements
du jeu de barres boulonné, nous vous
conseillons d'enduire les surfaces de contact
des raccordements d'un film de graisse,
référence. Une boîte de cette graisse est
fournie avec l'appareillage. Ne mettez pas de
graisse sur le filetage des boulons car cela
affecterait la force de serrage exercée.
