The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Correct rotation, wrong sequence
by Potseal
Today at 03:14 PM
Industrail Control Panel bonding per 409.108
by sparkyinak
Yesterday at 06:29 PM
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 12
HotLine1 10
Potseal 9
sparkyinak 8
Texas_Ranger 7
Who's Online
1 registered (cableguy619), 212 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#53519 - 06/27/05 07:38 PM Drum Copiers
BigB Offline
Member

Registered: 03/31/04
Posts: 727
Loc: Tucson, AZ USA
I hope someone with knowledge about drum type copy machines can respond. The unit in question states on the nameplate, Amps: 10 max. Problem is the breaker trips when the machine is on but not in use. A monitor revealed that every so often the machine would spike up to twenty amps while idle. I theorize this is the machine keeping itself warmed up while on standby. Is this a normal feature of a drum copier? (The 20 amps must be inrush. There is also a refigerator, cofee maker and computer on the 15 amp circuit, so I know it's overloaded, but I want to confirm the copier is acting normally. I have already contracted to run a new 20 amp circuit to the copier.
Thanks, Brian

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#53520 - 06/27/05 08:08 PM Re: Drum Copiers
dmattox Offline
Member

Registered: 10/20/04
Posts: 267
Loc: Anaheim, CA
I dont know if the spike you see is normal, but everytime I install a copier, the copier company requires a dedicated 20A circuit.

Top
#53521 - 06/27/05 08:39 PM Re: Drum Copiers
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
These things have halogen bulbs in them to heat the fuser and they do have a big inrush.
I think you did answer your own question with the fridge and coffee pot on the same circuit tho. Does it ever trip at night when the coffee pot is off?
_________________________
Greg Fretwell

Top
#53522 - 06/27/05 08:53 PM Re: Drum Copiers
BigB Offline
Member

Registered: 03/31/04
Posts: 727
Loc: Tucson, AZ USA
Yes as I said I know the circuit is overloaded and I know what needs to be done, but I wanted to confirm the copier is acting as it should. I don't want to sell them a new circuit only to have it blow the new breaker, then they will think I sold them a job they didn't need. I thought about the coffee machine but they said they never use the warmers and the machine is off fairly early in the day and the breaker still trips. It's probably the big side by side fridge along with the copier.

Top
#53523 - 06/27/05 09:05 PM Re: Drum Copiers
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
You could temporarily move the copier or fridge to another circuit with a fat commercial extension cord. If there is some kind of short in the copier it should still trip. I would expect the copier to have some internal supplimental O/C protection which would open with a short tho.
_________________________
Greg Fretwell

Top
#53524 - 06/28/05 04:06 AM Re: Drum Copiers
IanR Offline
Member

Registered: 12/06/04
Posts: 326
Loc: Palm Bay FL USA
Being that those big side by side fridges typically draw between 9 to 10 amps I'd say that the circuit is just overloaded. Additionally, those fridges have induction motors so there is also a signifigant inrush current there too.

Top
#53525 - 06/28/05 05:23 AM Re: Drum Copiers
NJwirenut Offline
Member

Registered: 09/15/01
Posts: 816
Loc: Bergen County, NJ
Yes, that type of cyclic current draw is a standard feature of most older copiers and laser printers.

The culprit isn't the copy drum, but the fuser assembly. This is a teflon-coated roller that is kept heated by a large quartz-halogen lamp, and used to seal the toner image onto the paper. The lamp is cycled on and off as needed to keep the fuser hot. The lamp can be up to 1000W in size, so it draws a substantial amount of power, which can cause problems for other equipment on the circuit.

Copiers really need a dedicated circuit.

Top
#53526 - 06/28/05 05:39 AM Re: Drum Copiers
George Offline
Member

Registered: 02/23/02
Posts: 380
While I agree that another circuit will solve the problem ...

I think the copier may also have a problem. The spike should be near the nameplate amps.

Top
#53527 - 06/28/05 06:04 AM Re: Drum Copiers
growler Offline
Member

Registered: 04/22/05
Posts: 66
Loc: Marietta, Ga. 30060
BigB, The first rule of trouble-shooting. Solve the problems that you know about. You know that the circuit is overloaded. You know that a coppier requires a 20 amp. dedicated circuit. You install said 20 Amp. circuit and that is where your responsibilities as an electrician end. If they still have problems it's time to call a repairman. I worked on those machines when I was young and I can tell you without the proper manuals and training that if you attempt to correct problems with the equipment that you will do more harm than good. Those machines require peroidic maintenance anyway.

Top
#53528 - 06/28/05 02:37 PM Re: Drum Copiers
richard Offline
Member

Registered: 08/07/03
Posts: 84
Loc: L.I. New York
you could have a bad breaker, in addition to the prior mention of a need for a dedicated circuit.after tripping and resetting numerious times, they will trip with a small inrush

Top
Page 1 of 2 1 2 >



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals