What doee the UL plate say on a Mark 7

paulmcohen · Post by **paulmcohen** » Mon Jun 27, 2011 11:49 pm

I want to know the current at 220 Volts. Did anyone who did the DIY upgrade find a UL sticker anywhere? I don't see one on the motor or anywhere else.

I found a someone to install a 220 volt circuit and converter for $125.

JPG · Post by **JPG** » Mon Jun 27, 2011 11:53 pm

paulmcohen wrote:I want to know the current at 220 Volts. Did anyone who did the DIY upgrade find a UL sticker anywhere? I don't see one on the motor or anywhere else.

I found a someone to install a 220 volt circuit and converter for $125.

Now that is much more reasonable!!!!!

I am sure it is less than 15A at 120v. Since it has a switching power supply it is difficult to predict current draw at different input voltages. Most noteworthy is the minimal startup surge.

It will be simpler to add a 20A circuit - 2 pole 15A breakers are rare.

paulmcohen · Post by **paulmcohen** » Tue Jun 28, 2011 12:23 am

JPG40504 wrote:Now that is much more reasonable!!!!!

I am sure it is less than 15A at 120v. Since it has a switching power supply it is difficult to predict current draw at different input voltages. Most noteworthy is the minimal startup surge.

It will be simpler to add a 20A circuit - 2 pole 15A breakers are rare.

The electrician quoted either 15A or 20A at the same price but he wanted the data from the UL label.

The picture of the Mark 7 and PowerPro headstock show a UL sticker but the DIY upgrade has a blank gray label in the same space.

michaeltoc · Post by **michaeltoc** » Tue Jun 28, 2011 10:02 am

paulmcohen wrote:The electrician quoted either 15A or 20A at the same price but he wanted the data from the UL label.

The specs on the SS website say 15A at 120v. At 220v the amperage would be less (approximately half). So a 15A circuit would be more than adequate, but if its the same money go for the 20A. This way you have the extra amperage when they come out with the 5hp PowerPro.

dusty · Post by **dusty** » Tue Jun 28, 2011 10:38 am

michaeltoc wrote:The specs on the SS website say 15A at 120v. At 220v the amperage would be less (approximately half). So a 15A circuit would be more than adequate, but if its the same money go for the 20A. This way you have the extra amperage when they come out with the 5hp PowerPro.

Just make sure that you understand: Extra amperage (surplus to the rating of the item being protected) is NOT a plus. It means that more current can be drawn than is intended, i.e. less protection.

JPG · Post by **JPG** » Tue Jun 28, 2011 1:00 pm

michaeltoc wrote:The specs on the SS website say 15A at 120v. At 220v the amperage would be less (approximately half). So a 15A circuit would be more than adequate, but if its the same money go for the 20A. This way you have the extra amperage when they come out with the 5hp PowerPro.

With a typical dual voltage induction motor - yes.

A Mark 7 has the dvr motor.

JPG · Post by **JPG** » Tue Jun 28, 2011 1:14 pm

dusty wrote:Just make sure that you understand: Extra amperage (surplus to the rating of the item being protected) is NOT a plus. It means that more current can be drawn than is intended, i.e. less protection.

Dusty is correct, but I would opt for the 20A at the same cost.

The electrical panel breaker is not intended to protect a portable(pluggable) device, but rather the structure wiring to the receptacle.

If you desire overcurrent protection for a pluggable device, get a 15A power strip. IMHO a prudent though unnecessary effort. Most of the time breaker tripping is the result of more catastrophic load conditions(unless too many devices are run off that circuit).

The electrician will recommend a 20A branch circuit for a 15A rated appliance. Since this will be a dedicated branch circuit IIRC the appliance should not be rated more than 80% of the branch circuit capacity.

The Power Pro is an unusual appliance due to its extremely variable power consumption characteristics. I doubt it averages more than half the 15A except under extreme load conditions(ripping 4" 100 yr old pine heartwood).

paulmcohen · Post by **paulmcohen** » Wed Jun 29, 2011 12:21 am

No one has answered the simple question, what does the UL Label actually say.

JPG · Post by **JPG** » Wed Jun 29, 2011 1:00 am

paulmcohen wrote:No one has answered the simple question, what does the UL Label actually say.

The specs say 15A.

I doubt a UL tag would say anything different.

We be assuming it has one! I have never seen one! CSA but no UL!

Gotta have a Power Pro to look!

I do not think a new vent plate is included in an upgrade!

paulmcohen · Post by **paulmcohen** » Thu Jun 30, 2011 12:10 am

JPG40504 wrote:The specs say 15A.

We be assuming it has one! I have never seen one! CSA but no UL!

I do not think a new vent plate is included in an upgrade!

I have the upgrade and it has nothing.

What is a CSA?