What type of cable is yttw? Yttw cable who invented, yttw and BTTZ cable comparison
What is the model of yttw cable is actually the model of mineral insulated cable, yttw is the model of mineral cable industry, national standard newly compiled model is RTTZ.

1.What kind of cable is yttw?

Yttw cable full name copper core braided copper sheathed mica belt mineral insulated cable, is a copper sheathed fire cable, strong flexibility, strong impact resistance, at the same time, the project cost is cheap, and can pass the project fire acceptance. Yttw cable composition:
a.cable conductor: there are many strands of copper wire twisted, with good bending characteristics.
b, insulation layer: high temperature resistant, non-burning inorganic mineral insulation material.
c, copper sheath: copper material, after special processing has a good bending characteristics, the new rules do not specify as PE line use, but copper sheath to earth; All YTTW are generally made of 3+1 or 4+1 core one of which is used as the grounding wire.
d. Outer protective layer: it is made of low-smoke non-toxic plastic material with good anti-corrosion characteristics.
Yttw cable structure

2.Who invented the yttw cable

YTTW is a new type of fireproof cable improved on the basis of the disadvantages of BTTZ mineral insulated cable. It is the result of continuous attempts by some domestic engineers and cable manufacturers to improve and innovate in the process of long-term application of BTTZ mineral cable. It can overcome the disadvantage of limited production length of mineral insulated cable, avoid the problem of intermediate joint in installation and laying, have the advantages of insulation layer is not affected by damp easily, installation and laying is convenient, etc. Yttw cable models include yttwy, yttwv, RTTZ, BTTRZ, BTTW, bttwe, btte, BTWTZ, etc. The name is shown in the following figure:
Yttw code meaning

3.yttw and BTTZ cable comparison difference

a. Structural differences between yttw and BTTZ cables:
the two types of cables from copper core to copper sheath are different. Yttw's structure is more time-saving and cost-saving than that of BTTZ in mass production and processing, but it retains the fireproof performance of BTTZ cable. Therefore, yttw cable is an improved type of BTTZ cable.
b. Performance comparison of yttw and BTTZ cables:
Yttw and BTTZ cable difference comparison table
The main difference between the two types of cable specifications, voltage grade, fire performance, cable appearance, normal operating temperature, and laying conditions both can be applied, without bridge or pipe; Service life BTTZ is over 100 years, while YTTW is 50-100 years.