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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => AC Power and Grounding => Topic started by: Rick Alan on September 23, 2014, 07:18:01 pm

Title: Portable Generator 4 − 20amp 120v
Post by: Rick Alan on September 23, 2014, 07:18:01 pm
Looking for portable generator for events where I do not need to rent trailer style generator. Needs 4 − 20amp 120v.

I have searched the forum for specific info with no luck so any insight would help. 

Thanks
Title: Re: Portable Generator 4 − 20amp 120v
Post by: Robert Piascik on September 23, 2014, 08:54:27 pm
How about a Honda EU7000iS? I think that would fit the bill
Title: Re: Portable Generator 4 − 20amp 120v
Post by: Rick Alan on September 23, 2014, 08:58:26 pm
How about a Honda EU7000iS? I think that would fit the bill

Thats what I was thinking with some Furman power conditions too but did not know if there was anything else on the market that I was missing.  Also just learned you can run 2 honda eu generators of the same model in parallel. 
Title: Re: Portable Generator 4 − 20amp 120v
Post by: g'bye, Dick Rees on September 23, 2014, 09:31:15 pm
Thats what I was thinking with some Furman power conditions too but did not know if there was anything else on the market that I was missing.  Also just learned you can run 2 honda eu generators of the same model in parallel.

What in the world do "power conditioners" have to do with anything?

You need to figure your power draw first.  What EXACTLY are you using for sound?  Any lights? 
Title: Re: Portable Generator 4 − 20amp 120v
Post by: Cailen Waddell on September 23, 2014, 11:23:30 pm
Rick you might do well to look through some other threads here on honda generators.  Lots of really excellent information that should get you the information you need.  I agree a 7000 will probably fit the bill, but knowing what equipment you have is helpful.  Additionally, the honda probably has the capacity but doesn't have 4 nema 5-20r receptacles so some other power distribution gear will be needed. 


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Title: Re: Portable Generator 4 − 20amp 120v
Post by: Mark Cadwallader on September 24, 2014, 10:32:38 am
If you really need four 20 amp 120v circuits (80 amp capacity), I don't think the EU7000is will do the job for you. Its rated output is only about 45 amps at 120 volts. Hence the questions from the others about the specific equipment to be used. Mark C.
Title: Re: Portable Generator 4 − 20amp 120v
Post by: Guy Holt on September 24, 2014, 06:20:45 pm
If you really need four 20 amp 120v circuits (80 amp capacity), I don't think the EU7000is will do the job for you. Its rated output is only about 45 amps at 120 volts. Hence the questions from the others about the specific equipment to be used. Mark C.

There are two options that will give you 80 Amps at 120V  from portable generators.  One is to use the Honda EB10000 and use a 10kVA 240-to-120V step-down transformer to convert the 240V output to 120V.  The EB10000 is an open frame industrial machine and is quite load. If you use a transformer with taps, you will be able to run the generator at a further distance, or from around the corner of a building, and boost the voltage on the transformer to compensate for the subsequent line loss.

The second option is to parallel two Honda EU7000s. With a paralleling box will get 50 Amps on two legs that are 180 degrees out of phase. But, again you will need to use a 10kVA 240-to-120V step-down transformer to convert the 240V output of the paralleling box to 120V.  It will help to reduce the cross current circulating between the two generators if the paralleling box offers a means of adjusting the load sharing between the two generators.  Use this link for more details on how to parallel Honda EU7000s  and even the older EU6500:http://www.screenlightandgrip.com/html/emailnewsletter_generators.html#anchorParallelingEU6500s (http://www.screenlightandgrip.com/html/emailnewsletter_generators.html#anchorParallelingEU6500s).

Guy Holt, Gafer
Screenlight & Grip
www.screenlightandgrip.com