STANDARD OF MICC CABLE
1.
Manufacturing standards:
(1).
GB/T13033-2007 MICC and its terminal with a rated voltage not exceeding 750V
(2).
IEC60702-2002 MICC and its terminal with a rated voltage not exceeding 750V
(3).
BS6207-2001 mineral insulated cables with rated voltages not exceeding 750V
2．Characteristic
standards:
(1).
BS6387: 2013 Performance standard for cables used to keep circuits intact under
fire conditions (UK)
(2).
GA306.1~306.2-2007 Fire standards of ministry of public security
(3).
IEC60332-3 Test under flame conditions
(4).
GB/T18380.1-.3-2001 Test under flame conditions
(5).
GB/T17651.2-1998 Smoke density test of the cable under specific combustion
(6).
GB/T17650.2-1998 Test for gas evolution during combustion of material taken
from mineral insulated cables
(7).
GB/T19216-2003 Test method for fire resistance characteristics of wire and
cable
(8).
IEC60331 Test method for fire resistance characteristics of wire and cable
(9).
UL2196 Cable fire resistance test (USA)
(10).
IEC60754-2 Test for evaporation of acidic and corrosive gases
(11).
IEC60134-2 smoke density test
3. Application standards:
(1).
GB50045-2014 Architectural design code for fire protection
(2).
JGJ16-2008 Code for electrical design of civil buildings
(3).
GB50217-2007 Code for Design of Electric Power Engineering Cables
(4).GB50116-2013
Design Specification for automatic fire alarm system
(5).
GB50157-2013 Code for metro design specification
(6).
GB50067-97 Code for fire protection design of garages, repair garages, and
parking lots
(7).
GB50333-2002 Construction technical specifications for hospitals and clean
operating departments
(8).DBJ50-054-2006
Code for fire protection design of large commercial buildings (Chongqing)
(9).
DG/TJ08-2048-2008 Code for Fire Protection Design of Large Commercial Buildings
(Chongqing)
(10).
DB21/T2116-2013 Building fire safety technical regulations (Liaoning)
(11).
Code for Fire Protection Design of Civil Building Wire and Cable (Chongqing)
(12).
09D101-6 Laying of mineral insulated cables
(13).
JGJ232-2011 Technical specification for laying of mineral insulated cables
(14).
BS5345 Customary rules for the selection, installation and maintenance of
electrical installations in potentially explosive gas atmospheres
(15).
AS2293 Fire detection and alarm in buildings
(16).
AS300 Fire Fighting equipment and elevators in wire regulation
(17).
GB/T16895.15-2002 Building electrical installations - wiring system ampacity
(18).
BS7671 Electrical installation requirements (UK)
(19).08ZD02 Standard design of electrical
atlas of buildings in the mid-south area
DESIGN SLECTION OF MICC CABLE
1. Model selection : BTTZ, BTTVZ,
WD-BTTYZ (heavy load) are suitable for applications where the voltage between
the wire core and the sheath and between the wire core and the wire core does
not exceed 750 V AC and DC RMS;
BTTQ, BTTVQ, WD-BTTYQ (light load) is suitable
for applications where the voltage between the wire core and the sheath and
between the wire core and the wire core does not exceed 500V AC and DC RMS;
2.
Plastic sheath should be used in the following cases:
(1). The cable is laid in an
environment that has a corrosive effect on the copper sheath
(2). Laying straight or piercing
(3). Exposed laid in the building
non-technical space with aesthetic requirements
(4). Where there are fire protection
requirements, low smoke zero halogen plastic outer sheath should be
used.
3. Specifications Selection
3.1 Laying environment
(1). Normal operating temperature of
70 °C
a. Along the wall, bracket, roof and
bridge and other open lines;
b. Laid together with other types of
cables in the same bridge, shaft, cable trench, cable tunnel line;
c. Other places where the temperature
of the cable sheath is too high and easy to cause personal injury or equipment
damage;
(2). Normal operating temperature of
105 °C
The cable is laid separately on
bridge, cable trenches, and conduit where no human touches it.
3.2 The length of delivery of the cable
needs to be considered when selecting specifications. Avoid using intermediate
connection whenever possible.
4. Design Essentials
(1). The copper sheath can be used as
a PE grounding wire;
(2). Plastic cables corresponding to
more than 16mm2 can be used in reduced cross-section. If the plastic cable is
designed 4x185+95, then the corresponding is BTTZ 4X (1X150);
(3). It’s unnecessary to consider
coefficients in the case of double combinations and multi combinations;
(4). If double combinations or multiple
combinations of large-section cables are used to replace bus duct, construction
investment can be reduced and line security is enhanced.
(5). Using special branch junction
box, the branch of the cable can be realized.
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