Among the fireproof cables, the common types are as follows: BTTZ, BTTRZ (RTTZ), BBTRZ, NG-A (BTLY), YTTW, BTTVZ, only the cables under the BTTZ category are rigid mineral fireproof cables, the others are Flexible mineral fireproof cable.
1. The full name of BTTZ cable is heavy-duty copper core copper sheathed magnesium oxide mineral insulated cable, which is resistant to high temperature, fireproof, explosion-proof, and non-combustible (it can run continuously for a long time at 250 degree , and can also run for a short time of 30 minutes under the extreme state of 1000 degree ) and large current carrying capacity, small outer diameter, high mechanical strength and long service life, generally do not need the characteristics of independent grounding wire.
The letter meanings of BTTZ fireproof cable are as follows:
B—Fixed installation power cable for wiring
T—copper sheath
T—Copper conductor
Z—withstand voltage class heavy duty 750V
As a rigid cable, BTTZ has the characteristics of complete fire protection, strong overload protection ability, high working temperature, anti-corrosion, long life and so on. It is suitable for fire protection cables required by fire protection systems in construction projects.
2. The full name of BTTRZ (RTTZ) cable is copper core inorganic mineral insulating tape wrapping insulated copper sheath flexible fireproof cable, which is called mineral insulated cable, also known as flexible structure fireproof cable, its production process and BTTZ type This type of cable has the characteristics of flexibility and flame resistance, good bending performance, very convenient transportation, and safer and more secure use.
The letters of BTTRZ (RTTZ) fireproof cable have the following meanings:
B—Fixed installation power cable for wiring
T—Copper conductor
T—copper sheath
R - softness
Z—withstand voltage class heavy duty 750V
The difference between BTTRZ and BTTZ is that BTTRZ is a flexible fireproof cable, BTTRZ can replace BTTZ, the former is a flame-retardant wiring copper cable, and the latter is not flame-retardant. The production process of the two is the same, but the insulating materials used are different, and the former is more used now.
3. The full name of BTTVZ is the full name of heavy-duty copper core copper sheathed magnesium oxide mineral insulated cable. Since all materials of this cable are inorganic materials, it has some advantages that other cables cannot have. Such as fire resistance, large current carrying capacity, resistance to mechanical damage, halogen-free non-toxic, explosion-proof, waterproof, corrosion resistance, long life, safety, overload resistance, high temperature resistance, low cost, small outer diameter and so on.
B---- Fixed installation power cable for wiring
T----copper sheath
T---- copper conductor
V----Polyethylene Y outer sheath
Z---- Withstand voltage option, withstanding voltage class heavy 750V, light 500V
4. The full name of BBTRZ is flexible magnesium hydroxide mineral insulated non-combustible fireproof cable. The structure of flexible mineral insulated cable adopts flexible structure and materials are all mineral compounds, which make up for the defects of hard structure, flammability, toxicity, etc. It also has some The advantages that other cables cannot have, such as: fire resistance, large current carrying capacity, impulse voltage resistance, mechanical damage resistance, halogen-free and non-toxic, explosion-proof, waterproof, corrosion resistance, long life, safety, overload resistance, high temperature resistance, low cost Features.
The letter meanings of BBTRZ fireproof cable are as follows:
B—Fixed installation power cable for wiring
B—Mineral Compounds
T—Copper conductor
R - softness
Z—withstand voltage class heavy duty 750V
5. The full name of NG-A (BTLY) is: aluminum sheathed flexible isolation type fireproof cable. NG-A cable is a soft conductor structure. After special processing, it has good electrical conductivity, mechanical resistance, flexible bending performance and high fire resistance. Performance; dense filling of mineral materials, high temperature resistance and fire resistance; low smoke and low halogen plastic material used as outer sheath, with good anti-corrosion properties.
The letter meanings of NG-A (BTLY) fireproof cable are as follows:
G----Isolation
N----Refractory
A----950-1000C degree
B----Mineral insulated cable for wiring
T---- copper conductor
L----aluminum metal sleeve
Y---- PVC outer sheath
6. The full name of YTTW cable is flexible fireproof metal sheathed inorganic mineral insulated cable. The fireproof cable is a cable that can burn at a high temperature of 950 degrees and can remain energized for more than 3 hours. It is mainly composed of an outer sheath layer and a copper conductor core. , and a refractory layer is provided in the outer expansion layer, so it has a high degree of fire resistance.
The meaning of the letters of YTTW fireproof cable is as follows:
Y—Mica tape metal sheathed mineral insulated cable
T—Copper conductor
T—copper sheath
W—inorganic mineral insulation
