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| The leading manufacturer of
monitor, computer cable
and LAN cable. |
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태영전자주식회사는 축적된 경험과 기술개발을 바탕으로 모니터, 컴퓨터, LAN 케이블을 생산하는 한국의 선도 기업입니다. 태영은 케이블 생산에 있어 디자인 부터 품질인증 제도까지 완벽한 총체적 시스템으로 ISO 9001 인증을 획
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Allowable Current of the Wire |
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->Allowable Current Calculation
Equation
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1.The allowable current of insulated wire is
calculated as follows.
(JIS 168C) (Single core cable laid in air or duct)
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Allowable current[A] |
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Conduct max. allowable Temperature[°C] insulation
heat resistant temperature |
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Abient temperature(generally 40¡E) |
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Conduct effective resistance of wire at T1°C
[￥Ø/cm] |
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Conduct effective resistnace of wire at 20°C
[￥Ø/cm] |
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Temperature coefficient of conductor resistance for
copper wire 0.00393 for all wire 0.0040 |
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Gross thermal resistance of insulation[ C*cm/W]
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Conductor outside dia.[mm] |
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Insulation outside dia.[mm] |
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: Allowable current reduction rate when
multiple of wire and
laid |
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￥ñ1: Unique thermal
resistance of insulation |
￥ñ3: Surface radiation
thermal resistance |
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[¡Écm/W] |
[¡Écm/W] |
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Polyethylene |
450 |
Materials shown |
550 + 100d2(d2¡Â40) |
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PVC |
600 |
in the left table |
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FEP |
400 |
innersed braid |
400 + 20d2(d2¡Â20) |
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TFE |
450 |
include |
800(d2>20) |
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Nylon |
450 |
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Max. allowable
temperature(°C) Reffer to heat
resistance of each material |
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General PVC |
60 |
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Heat Resistance PVC |
75, 80, 90, 105 |
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PE |
75 |
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FEP |
200
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2. The reduction rate must be applied when multiple
of insulated wires are to be laid side by side Reduction rate for multiple
laying in air(ⓒ&hibar;0)
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3. When the base temperature(T2)
is different from 40(30) °C, the conpensation factor for each temperature must
be applied.
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Base temperature compensation
factor |
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Allowable current at the base temperature
of T2 |
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Allowable current at the base temperature
of 40 °C |
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Conductor max.
temperature | |
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-> Allowable current of wire for
internal wiring of electric equipmen
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The following current of wire for internal wiring of
various electric equipment is as follows when one wire is installed in air |
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Normal Conductor Sectional
Area §± |
Allowable Current
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PVC cord for appliances
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Heat resistance PVC cord
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PVC insulated wire for 600V electric
equipment |
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0.75 |
7 |
8 |
10 |
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1.25 |
12 |
14 |
13 |
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2.0 |
17 |
20 |
18 |
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3.5 |
23 |
28 |
26 |
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5.5 |
35 |
42 |
36 |
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8 |
- |
- |
46 |
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14 |
- |
- |
68 |
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22 |
- |
- |
95 |
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30 |
- |
- |
116 |
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38 |
- |
- |
135 |
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50 |
- |
- |
159 |
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60 |
- |
- |
185 |
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80 |
- |
- |
225 |
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100 |
- |
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262 |
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Conductor max. allowable
temperature |
60 |
75 |
60 |
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Ambient temperature |
30 |
30 |
40
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-> Allowable Current Compensation Factor
Table
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When the ambient temperature is different, multiply
the following factor according to the temperature to calculate the allowable
curren |
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Vinyl cord for application |
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Vinyl insulated wire for 600V electric equipment
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(주)태영전자. 경기도 시흥시 정왕동 1269-6호 (시화공단 3나 107호) 429-850,
TEL. 031-499-5995 ~ 9, FAX. 031-498-3443
Copyright(C)2000 Taiyoung Electronics Co.,LTD. all rights reserved. |
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