Apartment service voltage

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Toros

Senior Member
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Tujunga, CA
Hi,
i am providing 1200A service @ 120/208v, 3ph, 4w for a new-build 25-unit apartment.

are you against that,
Approved or disapproved ????
 
Dennis Alwon

Dennis Alwon

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Toros said:
Hi,
i am providing 1200A service @ 120/208v, 3ph, 4w for a new-build 25-unit apartment.

are you against that,
Approved or disapproved ????
Click to expand...


How can we approve or disapprove without knowing the loads? It sounds very high but if there is a lot of heating and/or a/c loads it may be fine. Not sure what you are asking? Are you asking whether you should use 3 phase or single phase?
 
infinity

infinity

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At 1200 amps 208Y/120 volt service is fine. Just make sure that they purchase 208 volt appliances not 240 volt.
 
electrofelon

electrofelon

Senior Member
Location
Cherry Valley NY, Seattle, WA
infinity said:
At 1200 amps 208Y/120 volt service is fine. Just make sure that they purchase 208 volt appliances not 240 volt.
Click to expand...

Sierrasparky said:
The always buy 240v appliances and wonder why they perform poorly.
Click to expand...

People always say that. Is there really such a thing as 208 resi water heaters and ranges? I have never ever seen one, and couldn't find any on Google. One could get a 5500 @ 240 water heater which would be about 4200 @ 208.... I guess with enough money and/or buying power one can get whatever they want, but are people really seeing these in the wild?
 
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GoldDigger

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Some water heaters definitely allow you to install either 240V or 208V hearing elements of the same nominal wattage.

Sent from my XT1585 using Tapatalk
 
mbrooke

mbrooke

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United States
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infinity said:
At 1200 amps 208Y/120 volt service is fine. Just make sure that they purchase 208 volt appliances not 240 volt.
Click to expand...

Not necessary, in fact they don't even make dedicated 208 volt dryers and residential stoves. 240 volt equipment does fine on 208 volts.
 
infinity

infinity

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mbrooke said:
Not necessary, in fact they don't even make dedicated 208 volt dryers and residential stoves. 240 volt equipment does fine on 208 volts.
Click to expand...

You're probably right that most of this equipment is dual rated for 208 or 240 volts, as mentioned at 208 volts the output would be lower.
 
LarryFine

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
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Electrical Contractor
Dryers have everything except the heating element connected from L1 to N, rated for 120v. Only the heating element is connected from L1 to L2. On 208v, the heating power is almost exactly 75% of that on 240v.
 
Dennis Alwon

Dennis Alwon

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mbrooke said:
Not necessary, in fact they don't even make dedicated 208 volt dryers and residential stoves. 240 volt equipment does fine on 208 volts.
Click to expand...


Well that is not quite accurate as some stoves have a 208 rated kw rating as well as a 240v rating. As Larry said it is 75% lower at 208V. 16kw range is rated 12kw at 208 volts

My point is that it is still compliant to install these units on 208v as they are rated by the manufacturer for that voltage.

[h=4]POWER / RATINGS[/h]
Amp Rating at 208V40
Amp Rating at 240V40
Bake Wattage2650W Upper / 2650W Lower
Broiler Wattage3000W Upper / 3600W Lower
Convection Wattage2500W
KW Rating at 208V12.0
KW Rating at 240V16.0
 
LarryFine

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
Dennis Alwon said:
POWER / RATINGS
Amp Rating at 208V40
Amp Rating at 240V40
Bake Wattage2650W Upper / 2650W Lower
Broiler Wattage3000W Upper / 3600W Lower
Convection Wattage2500W
KW Rating at 208V12.0
KW Rating at 240V16.0
Click to expand...
Funny that they don't show the 208v amperage as 30a.
 
mbrooke

mbrooke

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United States
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Technician
Dennis Alwon said:
Well that is not quite accurate as some stoves have a 208 rated kw rating as well as a 240v rating. As Larry said it is 75% lower at 208V. 16kw range is rated 12kw at 208 volts

My point is that it is still compliant to install these units on 208v as they are rated by the manufacturer for that voltage.

POWER / RATINGS
Amp Rating at 208V40
Amp Rating at 240V40
Bake Wattage2650W Upper / 2650W Lower
Broiler Wattage3000W Upper / 3600W Lower
Convection Wattage2500W
KW Rating at 208V12.0
KW Rating at 240V16.0
Click to expand...




Factors into the calcs, I like it :)
 
augie47

augie47

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Tennessee
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State Electrical Inspector (Retired)
As mentioned, I would suggest your first step would be to check with the relevant POCO. Many wont supply 240/120 Delta any more.
 
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