transformer sizing

[mosman]

I need a little help in sizing an x-mer.
600v mains droped down to 208 /120v
50A welder recpt
8x20A recpt
30A trailer
15A lighting
the first 4 loads will be out of 1 panel and i would like the avaibility of 50 to 100 amps for future use.
thanks

[electric-ed]

Could use a little more information, but here goes anyway.

Assuming -
- the welder is 208 volt, 1 phase
- the receptacles are all 120 volt
- the trailer is 120 volt
- your future 100 amps will be 120 volt loads

Welder = 10400 va
Recepts = 19200 va
Trailer = 3600 va
Lighting= 1800 va
Future = 6228 va

Total = 41228 va = 41.2 kva - with everything on at once.
With normal use, 25 or 30 kva should do it.

Ed

[mosman]

<BLOCKQUOTE><font size=2 face="Verdana, Helvetica, sans-serif">quote:</font><table border="0" width="90%" bgcolor="#333333" cellspacing="1" cellpadding="0"><tr><td width="100%"><table border="0" width="100%" cellspacing="0" cellpadding="2" bgcolor="#FF9900"><tr><td width="100%" bgcolor=""><font size=2 face="Verdana, Helvetica, sans-serif">Originally posted by electric-ed:
Could use a little more information, but here goes anyway.

Assuming -
- the welder is 208 volt, 1 phase
- the receptacles are all 120 volt
- the trailer is 120 volt
- your future 100 amps will be 120 volt loads

Welder = 10400 va
Recepts = 19200 va
Trailer = 3600 va
Lighting= 1800 va
Future = 6228 va

Total = 41228 va = 41.2 kva - with everything on at once.
With normal use, 25 or 30 kva should do it.

Ed</font></td></tr></table></td></tr></table></BLOCKQUOTE>

[mosman]

thanks for your help ed