NH-90 450/750 V 25 mm2

Description

Description

Application:

Special application in places with poor ventilation, where, in case of fire, the emission of corrosive, toxic gases and smoke threatens life and destroys electrical and electronic equipment, for example in residential buildings, offices, industrial plants, movie, theaters, discotheques, hospitals, airports, underground stations, etc. In case of fire, possible victims have higher chances of surviving because they don't breath in toxic gases and have good visibility to escape the area. They are usually installed in conduits and in indoor areas in tray. Not recommended for outdoor installations. Not recommended for outdoor installations.

Construction:

Conductor: Compact soft copper, class 2.

Insulation: Halogen free thermoplastic compound HFFR.

Main characteristics:

Fire retardant, zero emission dense smoke and halogen free.

Cross section:

From 10 mm2 up to 95 mm2.

Marking:

NEXANS INDECO S.A. NH-90 450/750 V - Section - Year - (- sequential length m. || sequential length m. + ).

Packing:

Non returnable wooden reels.

Colour:

Yellow/Green.

National standards

NTP-IEC 60228: Conductors of insulated cables.

NTP 370.252: Thermoplastic and thermoset insulated cables of rated voltages up to and including 450/750 V.

NTP 370.266-3-31: Low voltage electrical cables. Cable with nominal voltage less than or equal to 450/750 V . Part 3-31: Cables with special properties before the fire. Single core cables without cover with halogen-free thermoplastic insulation and low smoke emission.

NTP 370.264-7: Insulation, covering and coating materials for low voltage electrical power cables. Part 7: Halogen-free thermoplastic compounds for insulation.

International standards

IEC 60228: Conductors of insulated cables.

IEC 60332-1-2: Test for vertical flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame.

UL 2556: Wire and Cable Test Methods. Section 9.3: FT1 (Vertical-Specimen) Flame Test.

IEC 60332-3-24: Test for vertical flame spread of vertically-mounted bunched wires or cables - Category C.

IEC 60754-1: Test on gases evolved during combustion of materials from cables - Part 1: Determination of the halogen acid gas content.

IEC 60754-2: Test on gases evolved during combustion of materials from cables - Part 2: Determination of acidity (by pH measurement) and conductivity.

IEC 61034-2: Measurement of smoke density of cables burning under defined conditions.

Calculation of Current Condition L.V.; NH-90

CALCULATION OF CURRENT CONDITION

Calculation of current capacity based on NEC (National Electrical Code NFPA 70) table 310.16 and table 310.17.

Maximum conductor temperature : 90°C.
Ambient air temperature : 30°C.
 

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Soft copper
Insulation
Halogen free thermoplastic material
Halogen free
Low content Halogen IEC 60754-1
Colour
Yellow / green
Lead free
Yes
Conductor flexibility
Class 2 IEC 60228
Conductor shape
Compact stranded

Dimensional characteristics

Dimensional characteristics

Conductor cross-section
25 mm²
Total number of wires
7
Conductor diameter
5.8 mm
Minimum insulation thickness
1.2 mm
Nominal outer diameter
8.3 mm
Approximate weight
263 kg/km
Number of cores
1

Electrical characteristics

Electrical characteristics

Rated Voltage Uo/U (Um)
450/750 V
Dielectric strength
2.5 kV
Time of application Dielectric strength core to screen AC
5 min.
Max. DC resistance of the conductor at 20°C
0.727 Ohm/km
Nominal capacitance
1240.0 pF/m
Perm current rating in air 30°C
157 A
Perm current rating in duct 30°C
106 A

Usage characteristics

Usage characteristics

Gases toxicity
Zero toxicity to IEC 60684-2
Gases corrosivity
Low Corrosivity IEC 60754-2
Smoke density
Low Smoke Emission IEC 61034-2
Flame retardant
IEC 60332-1-2; FT1
Fire retardant
EN IEC 60332-3-24 (cat C)
Metric marking
Double marking of sequential footage METRIUM
Maximum operating temperature
90 °C
Midspan
No
Minimum operating temperature
-40 °C
Overload maximum core temperature
100 °C
Short-circuit max. conductor temperature
160 °C

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