33. Metals may welded,
brazed soldered, but the most popular method on-site joining met-
als electrical installations nuts and bolts rivets. The rivet then placed the hole and the handles squeezed
together (b). The stem will fall out and discarded (d).
(c) (d)
FIGURE 14. The stem the rivet pushed into the nose
bush the riveter until the alloy sleeve the rivet flush with the nose
bush (a). The alloy sleeve compressed and the rivet stem will break
off when the rivet set and the joint complete (c).34
Metal joining with pop rivets.
(a) (b)
.
Thin sheet material such trunking often joined using pop riveter.
A nut and bolt joint may considered temporary fastening since
the parts can easily separated required unscrewing the nut and
removing the bolt.
Two pieces metal joined bolt and nut and machine screw and
nut are shown Fig. 14.
Bolt and nut Machine screw and nut
FIGURE 14. The nut tightened secure the joint. release the broken-
off stem piece, the nose bush turned upwards and the handles opened
sharply.33
Joining metals.34. 14.Electrical installations and wiring systems
321
Joining materials
Plastic can joined with appropriate solvent. rivet permanent fastening since the parts riveted
together cannot easily separated.
Special rivets are used with hand tool, shown Fig. Where pos-
sible, the parts riveted should clamped and drilled together with
a clearance hole for the rivet. When
joining trunking cable trays, round head machine screw should be
used with the head inside reduce the risk damage cables being
drawn into the trunking tray
