Sounds good to me!
Why are you limited to 190A?
Why are you limited to 190A?
Anything wrong with a 175 main breaker
Hi all, I'm upgrading a residential panel and am limited by the underground service to 190 amps. Anything wrong with buying a square D qo 200 amp loadcenter with lugs and installing a QOM2175VH 175 main breaker?
Thanks,
Darren
Thanks,
Darren
1 - 20 of 20 Posts
I have a 1/0 direct bury cable running from the street to my meter.
1/0 is good for 190A in Alberta?
There is a table in the code for cables run underground according to a certain detail.
Not sure it's correct, but I'm fairly certain it's 1/0 direct burial I see quite often feeding 200a service.
The maximum current that an aluminum conductor of a given size and insulation may carry shall be as
follows:
(a) single-conductor and single-conductor metal-sheathed or armoured cable, in a free air run, with a
cable spacing not less than 100% of the larger cable diameter, as specified in Table 3;
(b) one, two, or three conductors in a run of raceway, or 2- or 3-conductor cable, except as indicated in
Subrule (2)(d), as specified in Table 4;
(c) four or more conductors in a run of raceway or cable, as specified in Table 4 with the correction
factors applied as specified in Table 5C;
(d) single-conductor and 2-, 3-, and 4-conductor cables and single-conductor and 2-, 3-, and
4-conductor metal-armoured and metal-sheathed cables, in conductor sizes No. 1/0 AWG and
larger, installed in accordance with configurations described in Diagrams B4-1 to B4-4 in an
underground run, directly buried or in a raceway, as specified in Tables D8A through D15B.
Table D9A
Allowable aluminum conductor ampacities for the
installation configuration of Diagram B4-1
(See Appendix B Note to Rule 4-004.)
1/0 = 190
follows:
(a) single-conductor and single-conductor metal-sheathed or armoured cable, in a free air run, with a
cable spacing not less than 100% of the larger cable diameter, as specified in Table 3;
(b) one, two, or three conductors in a run of raceway, or 2- or 3-conductor cable, except as indicated in
Subrule (2)(d), as specified in Table 4;
(c) four or more conductors in a run of raceway or cable, as specified in Table 4 with the correction
factors applied as specified in Table 5C;
(d) single-conductor and 2-, 3-, and 4-conductor cables and single-conductor and 2-, 3-, and
4-conductor metal-armoured and metal-sheathed cables, in conductor sizes No. 1/0 AWG and
larger, installed in accordance with configurations described in Diagrams B4-1 to B4-4 in an
underground run, directly buried or in a raceway, as specified in Tables D8A through D15B.
Table D9A
Allowable aluminum conductor ampacities for the
installation configuration of Diagram B4-1
(See Appendix B Note to Rule 4-004.)
1/0 = 190
How on earth (or under earth to be more precise) do you know the service is in compliance of diagram b4-1?? The whole 190mm between each conductor and 915mm below surface?
Sorry, check out B4-3. Page 401.
Ah! That looks more likely... interesting it's the same ampacity!Sorry, check out B4-3. Page 401.
Also gotta derate it, don't you? Appendix B note on Rule 4-004..
Yeah I don't understand how the ampacity could be the same when one has the wire bundle together and one has them separated.
Pretty sure it's 90degree wire.
Pretty sure it's 90degree wire.
Sounds aboooot right then! 190A cable protected with a 175A breaker in a 200A tub.
I honestly don't understand much of that Diagram B4whatever junk.. never used it before.
I honestly don't understand much of that Diagram B4whatever junk.. never used it before.
To use those tables you need to get written approval from your inspector. Sketchy.
You should have got one of us Canadians to send you a metric measuring tape! :laughing:huh!, wonder if i got these 190mm apart?:001_huh:
![]()
~CS~
Not me though, I don't even have a metric measuring tape!
I'm late to the party on this but would like to throw what I think is correct in:
1) Check with your utility requirements - some may not accept that service size.
2) Residential services in Alberta are controlled by the Electrical Code Regulation (which supersedes CEC and Standata)
3) 1/0 AL is good for 125A for res. applications.
Schedule
1 For the purposes of section 3(a), the Canadian Electrical Code,
Part 1 (Twenty-second edition), being Canadian Standards
Association standard C22.1-12, is varied as follows:
(a) section 4 is amended by adding the following after
Rule 4-004(21):
(22) Notwithstanding Rule 4-006, 3-wire 120/240 V and
120/208 V service conductors for single dwellings, or
feeder conductors supplying single dwelling units of row
housing or apartments and similar buildings and terminating
on equipment having a conductor termination temperature
of not less than 75º C shall be permitted to be sized in
accordance with Table 5E.
(b) the following table is added after Table 5D:
Schedule AR 209/2006
ELECTRICAL CODE REGULATION
3
Table 5E
Minimum permitted size for 3-wire 120/240 V and
120/208 V service conductors for single dwellings,
or feeder conductors supplying single dwelling
units of row housing or apartments and similar
buildings and terminating on equipment having
a conductor termination temperature of
not less than 75º C
(See Rule 4-004 (22))
Size AWG or kcmil
Service or feeder
rating (A)
Copper Aluminum
60 6 6
100 4 2
125 2 1/0
150 1 2/0
200 2/0 4/0
225 3/0 250
300 250 350
400 400 600
1) Check with your utility requirements - some may not accept that service size.
2) Residential services in Alberta are controlled by the Electrical Code Regulation (which supersedes CEC and Standata)
3) 1/0 AL is good for 125A for res. applications.
Schedule
1 For the purposes of section 3(a), the Canadian Electrical Code,
Part 1 (Twenty-second edition), being Canadian Standards
Association standard C22.1-12, is varied as follows:
(a) section 4 is amended by adding the following after
Rule 4-004(21):
(22) Notwithstanding Rule 4-006, 3-wire 120/240 V and
120/208 V service conductors for single dwellings, or
feeder conductors supplying single dwelling units of row
housing or apartments and similar buildings and terminating
on equipment having a conductor termination temperature
of not less than 75º C shall be permitted to be sized in
accordance with Table 5E.
(b) the following table is added after Table 5D:
Schedule AR 209/2006
ELECTRICAL CODE REGULATION
3
Table 5E
Minimum permitted size for 3-wire 120/240 V and
120/208 V service conductors for single dwellings,
or feeder conductors supplying single dwelling
units of row housing or apartments and similar
buildings and terminating on equipment having
a conductor termination temperature of
not less than 75º C
(See Rule 4-004 (22))
Size AWG or kcmil
Service or feeder
rating (A)
Copper Aluminum
60 6 6
100 4 2
125 2 1/0
150 1 2/0
200 2/0 4/0
225 3/0 250
300 250 350
400 400 600
2 phase? 4 phase? 6 phase? Man Canada rockn some strange power systems :laughing::jester:
The milk bagging machines run on 6 phase.2 phase? 4 phase? 6 phase? Man Canada rockn some strange power systems :laughing::jester:
The milk bagging machines run on 6 phase.
:laughing: More efficient.
1 - 20 of 20 Posts
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