(Topic ID: 124835)

Amperage question for Gottlieb EMs


By goldenboy232

4 years ago



Topic Stats

  • 14 posts
  • 8 Pinsiders participating
  • Latest reply 4 years ago by schudel5
  • Topic is favorited by 2 Pinsiders

You

Linked Games

Topic Gallery

There have been 3 images uploaded to this topic. (View topic image gallery).

20150419_193806.jpg
20150419_193515.jpg
20150419_193340.jpg

#1 4 years ago

How many amps total does a Gottlieb EM draw during operation? What size breaker would I need if I wanted to run 4-5 EMs on one circuit? Sorry if that's a dumb question!

#2 4 years ago

Rule of thumb is 2.5A per game. Based on 80% rated breakers: 6 on 20A, 120V circuit, 4 on a 15A, 120V circuit. You can probably safely get a few more games per circuit, but this is a good starting point.

#3 4 years ago

Thanks, schudel5

#4 4 years ago

I run 6 games on one 15A circuit. However, even though they're all turned on, I don't think more than three have been played at one time. I have had no issues at all.

#5 4 years ago

Ok good to know. My collection will grow to three machines as of this week and I'm hoping to add two more within another couple of months, so hopefully I can run all 5 off one 15A or 20A circuit without problem.

#6 4 years ago

I ran 6 machines on 14 gauge wire and a 15 amp circuit with no problems. New service box and breakers and machines plugged into 3 separate outlets. Having 2 machines per outlet will give you the ability to do this as it will not overload the wire.

Ken

#7 4 years ago

Cool; thanks Ken!

#8 4 years ago

The GTB EM schematics that I have seen show power consumption on them and typically it's about 150 Watts. So at 120 V line voltage in USA? - that means 1.25 A per machine.

#9 4 years ago

Ok. Here is what I recorded using a Fluke 87 True RMS multimeter. The game I used was Fast Draw. All #44 incandescent lamps.

The meter has a 1000 clamp on ammeter. So, 1mA on the display = 1A. When recording, the meter captures min, max and average every 100ms.

During game over the game is 1.91A.

During game play, the average was 1.97A.

Max was 7.36A during game reset when all score reels, score motor, bonus relay, etc are resetting. That is an very instantaneous peak of at least 100ms. Not anything I'd use to calculate circuit loads, just an interesting reading.

20150419_193340.jpg20150419_193515.jpg20150419_193806.jpg

#10 4 years ago

I have never been an LED guy, but I have experimented with a way of putting a lot of LEDs in an EM without it being noticeable. I put warm white, frosted, single LED bulbs in the backbox and natural light, frosted, single LEDs under the inserts. I leave the GIs as normal 44 bulbs to prevent the ball strobing and also LEDs in the GI don't look right. You can't tell the difference on the ones in the backbox and under the inserts. This makes a big difference in the power draw and heat produced. I figure it removes around a half an amp if not a little more on games with a lot of lights in the backbox. I use Comet Pinball LEDs by the way. They are $26 for 100.

#11 4 years ago

You need non-ghosting for feature lights, or they will flicker from stray voltage that leaks thru the circuits. That style costs a bit more I think. I use Cointaker ones that are 99 cents a piece. Also, in regards to reset amperage, I would think if you reset all your machines at the same time, could trip the breaker, but I suppose they can handle a very short spike like that(?) Electricians feel free to chime in here for a reality check.

#12 4 years ago
Quoted from stashyboy:

Also, in regards to reset amperage, I would think if you reset all your machines at the same time, could trip the breaker, but I suppose they can handle a very short spike like that(?) Electricians feel free to chime in here for a reality check.

Yep breakers are set to handle high amounts of current for short durations. Otherwise every time a motor starts it would trip the breaker. Motors typically pull 7x their running current at startup.

The breaker never even saw this 7+A spike it was too fast. I can hear the multimeter beep every time a new high and low is recorded. Only heard it beep once during the reset cycle.

#13 4 years ago
Quoted from schudel5:

Here is what I recorded using a Fluke 87 True RMS multimeter.

Fluke is worth the money, glade I bought one, although a different model.

#14 4 years ago
Quoted from Chrisbee:

Fluke is worth the money, glade I bought one, although a different model.

This one is from about 1989. It's version 1 of the 87. I think the Fluke 87 is up to version 5 now. I had to replace the display, as they had some weird segment issues, but it's been a workhorse.

Promoted items from the Pinside Marketplace
$ 399.95
600 (OBO)
Machine - For Sale
Loogootee, IN
€ 8.40
$ 65.00
Cabinet - Armor And Blades
Texas Pinball
$ 8.00
Cabinet Parts
RPGCor
$ 79.95
Cabinet - Shooter Rods
Super Skill Shot Shop
$ 157.00
$ 249.99
Cabinet - Armor And Blades
Great American Pinball
$ 11.95
$ 7,499.00
Pinball Machine
Deadpool Premium Out of stock
Flip N Out Pinball
$ 999.00
Pinball Machine
Mircoplayfields
$ 24.00
Playfield - Other
Pin Monk
$ 165.00
Playfield - Toys/Add-ons
Pixels Arcade Games
From: $ 42.00
Cabinet - Shooter Rods
ModFather Pinball Mods
From: $ 149.00
Playfield - Toys/Add-ons
Sparky Pinball
$ 25.00
Cabinet - Other
Filament Printing
$ 48.00
Cabinet - Other
ModFather Pinball Mods

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside