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Sunday, December 13, 2009
Types of electrical wire
Types of electrical wire usually separated in 3 category:
Power cable
control cable
Instrument cable.
You may familiar with some Insulation and Jacket type such as
THHN/THWN
PVC/NYLON
FR-XLP
RHW-2 OR RHH OR USE-2
FR-XLP
HMWPE, LSZH.
Here are only few cable types and their applications example:
600 V THHN Copper conductor: For use in general wiring application and power in conduit.
600 V RHW-2 Copper Conductor: For use in harsh environments for general wiring direct burial.
300 V UL type PLTC: This is a multi-pair instrumentation cable: For use in instrumentation and process control applications
Copper Electrical Wire
Copper is the common used because copper is a very good conductor, and is easy to mold and bend.
Aluminum Electrical Wire
Aluminum is cheaper and more abundant than copper. It is also easy to shape and bend.
More important for electrical designer is to select the right size of electrical wire . The following link is the method of how to determine cable size.
Electrical Wire Size
Before selecting electrical cable, There are much more but here are just some criteria s to keep in mind :
Cable conductors
Cable AWG
Temperature
Shield type
Material type
No of pairs
Electrical wire size using table 310.16 NEC2008 on page 70-148. Simply calculate amperage (current) flow through the circuit and then apply the table.
SIZE AWG OR KCMIL
COPPER
COPPER
COPPER
ALUMINUM
ALUMINUM
ALUMINUM
SIZE AWG OR KCMIL
_
TYPE TW,UF
TYPES RHW
,THHW,THW,
THWN,XHHW
USE,ZW
RHW-2,THHN
THHW,THW-2
(90°C)
TYPES TW,UF
(60°C)
TYPES RHW
THHW,THW
THWN,XHHW
USE
TYPES TBS,SA
SIS,THHW<>
SIZE AWG OR KCMIL
18
16
14
12
10
8
_
_
20
25
30
40
_
_
20
25
35
50
14
18
25
30
40
55
_
_
_
20
25
30
_
_
_
20
30
40
_
_
_
25
35
45
_
_
_
12
10
8
6
4
3
2
1
55
70
85
95
110
65
85
100
115
130
75
95
110
130
150
40
55
65
75
85
50
65
75
90
100
60
75
85
100
115
6
4
3
2
1
1/0
2/0
3/0
4/0
125
145
165
195
150
175
200
230
170
195
225
260
100
115
130
150
120
135
155
180
135
150
175
205
1/0
2/0
3/0
4/0
250
300
350
400
500
215
240
260
280
320
255
285
310
335
380
290
320
350
380
430
170
190
210
225
260
205
230
250
270
310
230
225
280
305
350
250
300
350
400
500
600
700
750
800
900
335
385
400
410
435
420
460
475
490
520
475
520
535
555
585
285
310
320
330
335
340
375
385
395
425
385
420
435
450
480
600
700
750
800
900
1000
1250
1500
1750
2000
435
495
520
545
560
545
590
625
650
665
615
665
705
735
750
375
405
435
455
470
445
485
520
545
560
500
545
585
615
630
1000
1250
1500
1750
2000
Apply table to calculate electrical wire size
Assume the current calculated result is 14A, cable type is copper THHN, insulated conductors rated at 90° C, and so based on the table, cable size is 18 AWG. For practical safety application, recommended power cable should be bigger than 12 AWG.
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Very attractive and effective blog is created by the blog owner I like the way of present his view with visitors. I would like to come on this blog again and again. Copper Wire, copper wire suppliers in India
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