From general knowledge to specialist cable questions - we've tried to answer them all!
What is the package of the cable?
The package is usually wooden drum or steel wooden drum or coil, also according to customer’s requirement.
How does your company do regarding Quality Control?
1) All raw material we selected the high quality one.
2) Professional & Skilful workers care every details in handling the producing.
3) Quality Control Department specially responsible for quality checking in each process.
Are you a manufacturer or trading company?
We are a professional manufacturer with more than 28 years experience. We can control your order from the first beginning to the last.
Welcome to visit us. We'll pick you up in Beijing or Tianjin.
.When can I get the price?
We usually quote within 6 hours after we get your inquiry. If you are very urgent to get the price,please call us or tell us in your e-mail so that we will regard your inquiry priority.
How can I get a sample to test your quality?
The samples are free for you. New clients are expected to pay for the courier cost.
What is your MOQ?
The MOQ is different, as the different cable type.
Does your company accept OEM production?
Yes, OEM/ODM is available.
What is voltage rating?
The voltage rating of a cable is the highest voltage that may be continuously applied to a cable construction in compliance with the relevant cable standard or specification.
Voltage rating figures for cables are normally expressed in A.C. RMS. (Alternating Current Root Mean Square) and are written as a figure Uo/U (Um)
Uo = Rated voltage phase to Earth
U = Rated voltage phase to phase
Um = Maximum system
What are cable ratings?
Cable ratings determine the parameters within which a cable can be safely used. The most typical cable ratings are temperature, voltage and current.
Temperature rating is usually defined as one of the following:
- Max conductor temperature rating
- Minimum installation temperature rating
- Minimum flexible temperature rating.
Voltage is usually defined in terms of the following:
Uo = The R.M.S value between any insulated conductor and the earth or metal covering.
U = The R.M.S value between any phase conductor and another phase conductor or system of single insulated conductors.
(Um) = Maximum system voltage
The current rating is usually defined in terms of:
- Normal maximum continuous current rating
- Short circuit current rating
Cables may also be de-rated depending on the method of installation, for example, a cable installed in a thermally insulated wall will have a lower current rating than a cable of the same size and type which is installed in free air or in an open cable tray.
Cables installed in the ground at a higher than normal ambient temperature will have a lower current rating.
What are intrinsically safe cables?
Intrinsic safety is a protection technique for the safe operation of electrical and electronic equipment in hazardous areas where any ignition source needs to be eliminated.
Electrical cables are essentially sealed and so may be regarded as intrinsically safe in certain applications if protected from damage, external electrical or magnetic fields (EMI), and isolated from non-intrinsically safe circuits. The junctions and switches pose a potential hazardous ignition point in these environments and circuits. Intrinsically safe cables are usually coloured blue so as to identify the potential risk of the electric circuit and the need for special consideration. The cables are often protected by tough sheathing materials such as polyurethane to prevent any mechanical damage which could compromise electrical safety. Examples of intrinsically safe cables include the French Standard NF M87-202 instrumentation cables.