Operation Manual

46 GMC-I Messtechnik GmbH
15.7 Testing Extension Cables for VDE 0701-0702 (VDE 0701 Part 1)
(optional EL1 adapter)
Extension Cables up to 5 m Long
Protective conductor resistance between the earthing contact at the
mains plug and all exposed metal parts may not exceed 0.3 for protec-
tion class I devices. This value may not exceed 1  for permanently con-
nected data processing systems (DIN VDE 0701, part 240).
Extension and Connector Cables Longer than 5 m
An additional cable resistance of 0.1 , however, not more than 1 , is al-
lowable as of a length of 5 m for each additional 7.5 m.
Resistance testing for cables longer than 5 m is thus advisable (see also
limit values on page 20.
Note
+
The EL1 accessory adapter is required for testing for short-
circuiting and interruption of single-phase extension cables.
Connecting the Extension Cable or the Multiple Outlet
Note
+
The keys in the adapter’s handle have no function.
Performing the Test
õ Connect the extension cable to the EL1 adapter as shown in the figure
above.
õ Select the “
Ext. Cable WITH EL1 ” test from the initial menu with the cursor
and acknowledge with the key:
x .
õ Select “Start Testing” with the key.
õ Start the test sequence with the key.
õ First perform and acknowledge visual inspection of the extension cable.
õ Enter the length of the cable with the
and keys. Acknowledge with
the key.
For conductors with a rated current of
> 16 A, the cross section has to be
taken into account during measurement
(only 3-phase adapter application, not
EL 1).
PROBE 5 4
(21)
EL1
SECUTEST
Device Under Test =
Extension Cable
Test Socket