6. Color definition of wire
Electronic wire main color:
Black, brown, red, orange, yellow, green, blue, purple, gray, white, pink, light blue, light gray.
Communication cable pair primary-secondary color
a) Line (main color): white, red, black, yellow, purple
b) Line (secondary color): blue, orange, green, brown, gray multiple logarithm based on primary and secondary colors:
It is distinguished by methods such as / insulation color, color bar, color point, color ring, and core wire labeling. Or make it into a basic unit with a cable tie for identification;
Color of other wires:
Mainly in accordance with the requirements of wire standards or association standards (such as ICEA Insulated Cable Engineer Association, and Western European Electronic Standard WesternElectric, etc.).
North American AWG system: Black (L) White (N) Green (E) Red (4) Yellow (5) Orange (6)
European Harmonized System: Brown (L) Blue (N) Yellow / Green (E)
Or all lines are black except the ground line is yellow / green. Each line is printed with 1,2,3,4, etc. or the color standard developed by the company to facilitate unified management.
Specific color standards refer to PANTONE, or RAL 840 HR and RAL841 GL.
Or customer's sample color (see attachment 02 PANTONE color card, 03 RAL_German standard).
The outer quilt (sheath) is not specified, and can be made according to user requirements
IEC 757 rules for color coding and abbreviations:
7. Classification of wire
Classified by material (refer to UL758): If UL (Underwrite ’s Laboratories) American Commercial Insurance Laboratory, the American National Standard ANSI uses 70% of the UL standard as its standard:
Classified by safety standards:
CCC Standard: China Electrical Equipment Certification Committee Standard 3C logo is shown in the figure on the right. The wires we often use are: BVR, RVV, RV, RVB, etc .;
UL standard: The standard of the American Commercial Insurance Laboratories. The logo is shown on the right. The wires we often use are: UL1007, UL1015, UL1061, UL3266, UL3271, UL1330, SJTW # 12 * 2C, UL2651, UL20276, UL2464, etc.
Classified by shape:
Round wire: such as UL1015, UL1007, SJTW # 12 / 3C, SVT # 18 / 2C, RVV3 * 1.5, etc.
Flat wire: such as FFC, UL2651, UL2468, SPT-3, RVVB, etc., see the table below:
8. The meaning of wire printing
The printed content shall include: certification mark, certification code, wire gauge, wire number, pressure rating, heat resistance rating, fire rating, etc. Click to view: Training materials for wire surface printing
Description of UL printing content:
AWM: American Wire Gauge;
VW-1: UL vertical resistance 105 ℃: rated temperature;
E ****: UL certification number;
AWG18: line number;
600V: rated voltage;
CSA LL ****: Canadian certification number
TEW 105: Canadian model;
FT1: CSA is vertical flame retardant.
(AWM: appliancewiring material; AWG: American Wire Gauge; CSA: Canadian Standards Association)
Some I / II, A / B and other words mean the following meanings: Class I internal use, Class II external use
Group A is not subject to mechanical wear, Group B is subject to mechanical wear, W is used in tidal environments, O anti-oil, F anti-fuel oil, etc., FT1 vertical combustion test, FT2 horizontal combustion test, FT4 vertical combustion test, FT6 horizontal combustion and smoke test.
CCC standard, China Electrical Equipment Certification Committee standard:
1) CCC: short for China Compulsory Certification;
2) 227 IEC 06: meet the requirements of 227 IEC 02;
3) R: flexible wire;
4) V: PVC insulation;
5) 300/500: line voltage / phase voltage;
6) 1 * Size MM ^ 2: 1 square wire;
7) CHAU ’S: supplier logo;
9) 2002010105011353: 3C certification number of wire factory;
10) GB5023-97: national standard 5023-97
Non-UL wire structure, generally does not print, wire specifications are described as follows:
3COAX (B) * 28AWG + (1P * 28AWG + D + AL + Mylar) * 4C + 1P * 28AWG + 5C * 28AWG + AL + B
1) COAX: coaxial line;
2) B (braid Shield): The shield is braided;
3) S (Spiral): winding;
4) AWG: American Wire Gauge;
5) P (Pair): twisted pair;
6) D (Drain): ground;
7) AL: aluminum foil;
8) Mylar: Mylar
9. Wire Gauge and Corresponding Ampacity
Definition of safe current:
Before the conductor or insulator of the system can dissolve the current that the conductor can withstand, the thermal system current is generated when the conductor passes through the conductor, so the current increases and the conductor temperature will rise. The factors affecting the current flow are described below:
■ Conductor size: The larger the conductor area, the larger the current it carries;
■ Insulation: The temperature generated by the current cannot exceed the rated temperature of the insulator;
■ Ambient temperature: If the ambient temperature is too high, the insulator will be reduced