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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