Q:What can not be used for fuse?

Fuse made of nickel chromium alloy wire, its melting point is low, in the case of high voltage will fuse, thereby disconnecting the circuit, to protect the purpose of the circuit!

Q:How short is the high definition data line?

High-definition line that is high-definition multimedia transmission wire, in English called "High Definition Multimedia", abbreviated as "HDMI" line. The general HDMI line consists of two parts, the interface and the wire. HD line is specially developed for high-definition video and audio equipment, so he has put forward higher manufacturing requirements for interface, wire, joint and manufacturing process.

Q:What type of cable should be used for direct buried lighting cables?

Armoured all plastic copper core cable, that is, plastic insulation or sheath, is covered with armor outside it, used to fight against possible mechanical external forces, plays a protective role on the cable.

Q:Why do copper ions insert aluminum wire and red material will appear on the surface of aluminum wire?

Because aluminum is more active in metals than copper, aluminum and copper ions undergo substitution reactions to form aluminium ions and copper.

Q:A thin aluminum wire similar to a thin wire

It shows by wire, aluminum wire and the volume of the same, but the iron density than aluminium, can be used for quality balance of two metal rods, the quality is good, the quality of the aluminum bar is small; can be distinguished according to different material density.

Q:Copper wire drawing machine with copper wire drawing machine, what is the difference

The power wire drawing machine drawing machine motor copper clad aluminum a little smaller, because the tensile strength of copper clad aluminum is relatively small

Q:There is a small hole in the stainless steel pan. Can you mend it?

To the processing of stainless steel products shop with stainless steel electrode welding as well, glue trap properly don't because the plastic is toxic.

Q:Construction and technical parameters of LED lamp

Color: conventional color: warm white (WW), 2700-3200k (NW) 4000-4500K, the natural light is white (PW), Leng Baiguang 6000-6500K (CW) cold white 7000-7500k [here cold white difference and jewelry, cool white jewelry light is generally 15000-20000K] in addition, red, green, blue and other single color lamp Chang can do.

Q:How many coarse aluminum threads does a 4 kW single-phase motor require?

Specification of cable selection 1. is determined using the specifications of wire and cable (conductors), should consider fever, voltage loss, economic current density, mechanical strength and other conditions. According to the experience of low-voltage power line due to the load current is large, so generally according to the heat conditions section, and then check the voltage loss and mechanical strength; 2. low-voltage lighting line because of its high requirements of voltage level, can according to the allowable voltage loss section, then checking the heating conditions and Mechanical strength; 3. on high voltage lines, first according to economic current density section, and then check the heating conditions and the allowable voltage loss; 4. high-voltage overhead line, its mechanical strength is also fulfilled. If the user does not have experience, you should consult the relevant professional units or people.

Q:What is the phenomenon of aluminium wire immersed in copper sulphate solution?

Reaction note: the aluminum wire has a dense film on the surface, so that the active aluminum can not contact the copper ions in the solution, and then the replacement reaction occurs. Therefore, before the reaction, the surface oxide film should be polished off with sand paper and then reacted.