Multi-Wire Environment; Conduit; Testing A Wire Pair In A Conduit; Testing A Single Wire In A Conduit - Fluke Networks TS100 Mode D'emploi

TS100 Cable Fault Finder
Users Guide

Multi-Wire Environment

When testing wires in a multi-wire environment, such
as 4 wire telephone cable, 8 wire CAT-5 cable, 12-2 with
ground AC wire, or several THHN wires inside a
conduit, a short could exist between any number of the
conductors, including a shield or the conduit. To detect
the short, you must connect the tester to the wires that
are shorted. This means that to fully test a multi-wire
cable, you must check every wire against every other
wire including the shields and conduits.
While a quick way to test many conductors against
conduit or shield length is to connect all the conductors
to one clip lead and the shield to the other lead, this
will reduce the impedance of the cable, and
measurements may fall below the tester's range. It is
more reliable to test the wires individually.

Conduit

There are two methods for testing wire in conduit. You
can test a wire pair or a single wire.

Testing a Wire Pair in a Conduit

To test a wire pair, connect the two test leads to the
pair. If one wire separates from the other for 1 ft
(30 cm) or more, the tester indicates an open at the
separation. For example, if the wires separate after
exiting the conduit, the tester indicates an open at the
end of the conduit.

Testing a Single Wire in a Conduit

You can test a single wire by clipping one test lead to
the wire and the other to the conduit. The tester shows
the length up to a fault or to the point where the wire
separates from the conduit by at least 1 ft (30 cm). For
example, if there is a 2 ft (30 cm) service loop outside
the conduit, the tester shows the length up to the
service loop. This is true even if the two sections of
conduit are electrically connected.
8

Inventory Management

The tester is an inventory management tool. It
measures lengths of wire or cable still on the spools.
The ability to measure the length of multi-conductor
cable remaining on its spool is valuable for both job-
site and warehouse personnel. Remember that with
the TS100, you can measure the length from JUST ONE
END of a PAIR of wires, allowing you to take inventory
without unspooling the cables or even having to move
the spools at all.
At the job-site, you can determine if the cable
remaining on your spool or in your box will be
sufficient for the job at hand. This will save you an
unnecessary trip to the warehouse for more cable, and
help you avoid running out of cable in the middle of an
installation.
There are two points to remember when measuring
the length of wire on a spool:

The wire length must be within the range of the
TS100 (see Table 2).

The accuracy of the measurement will be optimum
if the VOP is set correctly for the type of wire being
measured. See Table 2 for a list of specifically
identified cables and Table 3 for a list of VOP
values for other cable types.
In the warehouse, you can quickly measure the cable
remaining on all your spools, allowing you to select the
right spool for each job. Additionally, by keeping a
record of the prior inventory, you can determine how
much wire was used on the current job.
Remember that the TS100 works on TWO
conductors. Single conductor spools can not be
measured with the TS100 Cable Fault Finder.
Note