300 amp residential

Status
Not open for further replies.
J

jonesjax

Member
customer wants a 300 amp serv with a sub feed for the 200 amp panel and a 100 amp breaker for an outside panel next to tyhe service. I have been on the phone with Graybar elec and Murry today and no one has bothered top cal me back

Anyone know of a meter combo that would fit this application
 
I have never done a 300 amp service -- either 200 or 400. I would bet that it will be easier to get a 400 and probably cheaper than special ordering a 300 amp unit.
 
Around here we install 300 amp residential services because the POCO will allow the use of a 300 amp meter pan. 400 amps generally require CT's. Also you will need to group your service disconnects together. My guess is that you'll need a 300 amp meter pan and 2 disconnects. One for each panel.
 
I have a SQ-D metermain (combination service entrance device) at my house, it's 400A rated. I have three branch breakers, a 200A, a 150A and a 60A for the pool panel......
 
Check out Milbank, I generally install a 320 amp service, with twin 200 amp breakers, but i'm sure you can get whatever you can imagine... FYI, my POCO has approved certain meter cans I can install, so check with your local POCO before buying anything...
 
Dave_PE said:
I have a SQ-D metermain (combination service entrance device) at my house, it's 400A rated. I have three branch breakers, a 200A, a 150A and a 60A for the pool panel......
Click to expand...


dave, where did you get this 400a combo unit, and do you have a pic of it? i heard that square d had come out w/ a 400a version of the cm200s w/ parallel 200's but i can't find a pic of what it looks like. i'm interested in this because it seems easier to use than having to punch 2" ko's in a 400a meter an attach qo2's, which would save me a lot of time. thanks for any info. btw, do you know what you paid for it? supply house here looked it up at the desk and told me $550. seems kinda steep considering the 200a version cost me only $90.
 
http://www.squared.com/us/products/load_centers.nsf/unid/C12DEBCCD50D494585256A70006BC91D/$file/all_in_one.htm

all_in_one.jpg


All-in-One devices provide installation labor savings and have been designed specifically for areas where local codes allow main breaker load centers to be mounted outdoors. All-in-Ones are surface, semi-flush, and convertible (surface/semi-flush) mount designs.
  • Ring or ringless styles available
  • Available in two styles for either QO? or Homeline? interiors
  • 100 A to 400 A Main Ampere ratings
  • Available in 10 to 40 branch circuit space configurations
    semi-flush
  • Generator Kits available to provide switching method between main utility service and back-up power source
  • Can accommodate plug-on SURGEBREAKER™ Secondary Surge Arrester
  • All units built per ANSI C12.7, NEMA PB-1, UL standards 50, 67 and 414 and are listed in UL file number E-6294
  • Devices meet Federal Specifications W-P-115C for government housing
    Devices meet the Electric Utility Service Equipment Requirements Committee (EUSERC) standards
  • NOTE: Check with local utility to ensure selected equipment meets local requirements
Click to expand...

Is this it?
 
Although the 400 amp combo unit takes up less space and is less labor intensive, I have never been a fan of them. I still use a 325 amp meter base with 2 200 amp panels on either side. Usually a feed thru panel is what I would use. I would then feed 2 200 amp main lug panels in the house and still have some circuits outside for a pool, a/c, detached garage, etc.
 
Status
Not open for further replies.
Top