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termination lug may also exhibit some minor movement of the
termination lug; again normally this movement is less than about
1/8 of an inch.
3 Make a written translation of the following:
When a longer service life breaker is wanted, a bolted type is
typically used. These types have a metal tab (one for each phase)
sticking out from one end that is bolted to the busbar with a
machine screw (bolt type fine threads and not sheet metal screw
type steep pitch threads).
When replacing these types of breakers, the retaining bolts or
machine screws will have power on them unless power to the
entire panelboard has been removed.
It is not un-common for some individuals to initially determine
that it is necessary to replace these types of breakers with power
still applied to the busbars. I am not a big fan of working anything
above 12 volts hot, for I have witnessed too many good folks get
hurtdoing what was initially anticipated as being a quick and
simple task.
4 Make the following phrases complete.
1. When a longer service life breaker is wanted, a … is
typically used.
2. When replacing these types of breakers, the retaining bolts
or machine screws will have power on them unless … .
3. Stab lock type breakers are found in … .
4. Conductors for the supply and load are typically secured to
the breaker using … .
5. The circuit conductor termination lug may also exhibit
some … .
5 Put 5-7 questions to Text 1.
6 Find, read and translate the sentences in Text 1 in which we
learn about Stab Lock Type Breakers.
7 Working in pairs test each other’s ability to describe
methods of securing circuit breakers.
8 Make a plan to Text 1 and retell it.
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