Tech Support Pits column from  Dear Webby's Humor Letter
widely read, forwarded, copied and imitated daily since 1994
Dear Webby's Humor Letter, daily since 1994


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DearWebby is actually Helmut Morscher, the CEO of Webby, inc.

Originally the "Tech Support Pits" were reports of the funniest tech support incidents, but over the years the column gradually shifted to answering tech support questions put forward by the readers of the Dear Webby Humor Letter.

This collection of computer and web advice was started partly because readers demanded an archive, and partly because some questions were asked again and again. Each page has a different day's Tech Support Pits column.

Have FUN!
DearWebby
   
Tech Support Pits column from Dear Webby's Humor Letter
09/21/96: Ampacity Table


Tech Support Pits:
What size wire is needed for a given Amperage
(number of Amps of all devices connected)

NEC Code installations
Ampacity at 75C conductor
temperature 30C ambient

Wire
Size

600V

One to 3 Conductors
in Raceway, Cable
or Direct Burial

Single Conductor
in Free Air

AWG or
KCMIL

AMPERES

Size

CU

AL

CU

AL

14
12
10
8
6
4
2
1
1/0
2/0
3/0
4/0
250
300
350
400
500
600
700
750
800
900
1000
1250
1500
1750
2000
15
20
30
50
65
85
115
130
150
175
200
230
255
285
310
335
380
420
460
475
490
520
545
590
625
650
665

15
25
40
50
65
90
100
120
135
155
180
205
230
250
270
310
340
375
385
395
425
445
485
520
545
560
20
25
40
70
95
125
170
195
230
265
310
360
405
445
505
545
620
690
755
785
815
870
935
1065
1175
1280
1385

20
30
55
75
100
135
155
180
210
240
280
315
350
395
425
485
540
595
620
645
700
750
855
950
1050
1150



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