Marathon 20 HP Explosion Proof Motor, 3 phase, 1800 RPM, 230/460 V, 256TC Frame, EPFC - C328A

Catalog #:C328A
Part #:256TTGN14044
  • Frame Construction:56 Frame-Rolled Steel.143-256TC-Cast Iron “Blue Chip”
  • Thermal Protection:56 Frame-Auto Overload,143-256TC-T-Stats
  • Class/Group:56 Frame-Class I, Groups C & D,143-256TC-Class I, Group D
  • Temperature Code:56 Frame-Class II, Groups F & G,143-256TC-Class II, Groups F & G
  • Conduit Box:56 Frame-T3B;143-256TC-T3B
  • Service Factor:56 Frame-Shipped Loose;143-256TC-Installed
  • UL File:56 Frame-1.0 (unless otherwise noted);143-256TC-1.0 (unless otherwise noted)
  • CSA File:56 Frame-E12044,LR47504;143-256TC-E12044,LR47504
File is not found. Please try again or contact customer service.
Sorry, at this time this product does not comply with the standards of the country you selected.
This product complies with the standards of the country you selected.
The account you are currently on does not have access to purchase this product. Please change to your {0} account to purchase.
The following item(s) have been moved to {0}: {1}
Quantities over {0} may require additional lead time. A Regal representative will contact you if this occurs.
You can only order in multiples of {0}. Please enter a valid quantity for this item.
Sorry, this item is no longer available.
Discontinued
Available warehouses not found.
Sorry, this item is no longer available.

General Specifications

UPC: 722856022776 Weight: 418.00 LB
Packaged Length: 35 IN Packaged Width: 26 IN
Packaged Height: 21.01 IN

Nameplate Specifications

Output HP: 20 Hp Output KW: 14.9 kW
Frequency: 60 Hz Voltage: 230/460 V
Current: 50.0/25.0 A Speed: 1765 rpm
Service Factor: 1 Phase: 3
Efficiency: 91 % Power Factor: 82
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: F
Frame: 256TC Enclosure: Explosion Proof Fan cooled
Thermal Protection: Thermostats (N/C) Ambient Temperature: 40 °C
Drive End Bearing Size: 6309 Opp Drive End Bearing Size: 6210
UL: UL Listed And CSA Certified CSA: Y
CE: N IP Code: 54
Hazardous Location: EXP PROOF CL I GR C&D CL II GR F&G T3B

Technical Specifications

Electrical Type: Squirrel Cage Induction Run Starting Method: Across The Line
Poles: 4 Rotation: Reversible
Resistance Main: .468 Ohms Mounting: Round
Motor Orientation: Horizontal Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: T Overall Length: 25.77 in
Frame Length: 12.25 in Shaft Diameter: 1.625 in
Shaft Extension: 3.75 in Assembly/Box Mounting: F1 ONLY

Speed Characteristics

Curvepoint Current (Amps) Current (%) Torque (ft-lbs) (%) Speed (RPM) Rated Output (KW) Power Factor (%) Rated Output (Hp)
Break-Down 86.00 344.0 145.00 244.0 1,625 67.0 20.00
2/3 115.00 460.0 105.00 176.0 1,250 20.00
Pull-Up 125.00 500.0 94.00 158.0 900 20.00
No Load 9.50 38.0 0.00 0.0 1,800 20.00
1/3 135.00 540.0 92.00 155.0 200 20.00
Full Load 25.00 100.0 59.50 100.0 1,765 20.00
Locked-Rotor 140.00 560.0 108.00 182.0 0 41.5 20.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 9.50 11.50 15.00 19.50 25.00 28.50 31.00
Rated Output (KW) 0.50 4.50 8.50 12.50 16.50 19.00 20.50
Efficiency (%) 0.0 85.5 90.2 91.0 91.0 90.2 89.5
Power Factor (%) 7.0 48.0 70.0 79.5 82.0 84.0 84.5
Speed (RPM) 1,800 1,790 1,785 1,775 1,765 1,760 1,755
Temp. Rise @ FL 0.0 0.0 0.0 0.0 70.0 90.0 105.0
Torque (ft-lbs) 0.00 14.50 29.50 44.50 59.50 68.50 75.00
This name is used, please enter another
{0} was created successfully.
{0} was deleted successfully.
Please select an account
Profile updated successfully.
Thank you for your registration request. We have submitted your information to your company's administrator for review and approval.
You have been logged out due to inactivity. Please log in again.