Operating instructions

Issue Date: 2003-09-25 Page 18 of 25 Report Reference # E203413-A17-CB-1
IEC 60950
SubClause Difference + Test Result - Remark Verdict
UL International Demko A/S
1.7.2 Wiring terminals supplying Class 2 outputs marked
with voltage rating and "Class 2" or equivalent
N/A
1.7.6 Special fuse replacement marking for operator
accessible fuses
N/A
1.7.6 Lamp replacement information indicated on
lampholder in operator access area
N/A
1.7.7 Identification of terminal connection of the
equipment earthing conductor
N/A
2.1.1 Screw shell of Edison-base lampholder tied to the
neutral conductor
N/A
2.1.1.1 Bare TNV conductive parts in the interior of
equipment normally protected against contact by a
cover intended for occasional removal are exempt
provided instructions include directions for
disconnection of TNV prior to removal of the cover
N/A
2.3.1.b Other telecommunication signaling systems (e.g.,
message waiting) than described in 2.3.1(b) are
subject to M.4.
N/A
2.3.1.b For TNV-2 and TNV -3 circuits with other than
ringing signals and with voltages exceeding 42.4
Vp or 60 V d.c., the maximum current limit through
the 2000 Ohm resistor with loads disconnected is
7.1 mA peak or 30 mA d.c. under normal conditions
N/A
2.3.1.b
Limits for measurements across 5000 Ohm resistor
in the event of a single fault are replaced after 200
ms with the limits of M.3.1.4
N/A
2.3.2 Enamel coating on signal transformer winding wire
allowed as an alternative to Basic insulation in
specific telecommunication applications when
subjected to special construction requirements and
routine testing
N/A
2.5 Overcurrent protection device required for Class 2
and Class 3 limiting in accordance with the NEC, or
the Limited Power Source definition, not
interchangeable with devices of higher ratings if
operator replaceable
N/A
2.5 VA for limited power source measured after 60 s of
operation
N/A
2.6 Protective earthing terms applied per CEC, Part 1,
Sec. 0 and NEC Art. 100
Class II equipment N/A