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NAVY / MARINE POSITION

EA780/790 SERIES Navy-Marine Position

PH 800.390.6405 | customer.service@sptech.com | www.namcocontrols.com

Series Overview

Built for Navy/Marine Requirements

1NO/1NC, 2NO/2NC, 2NO, 2NC, 4NO, 4NC

Cam-Type SNAP-LOCK® Technology

Three Mounting Styles Available (Standard, Wide, Long)

Built for Navy/Marine Requirements

Completely fabricated from non-corrosive materials, including a bronze enclosure and stainless steel shaft

Heavy Duty Electrical Contacts EA780 - Sliding Type; EA790 - Butt Type

1NO/1NC, 2NO/2NC, 2NO, 2NC, 4NO and 4NC contact arrangements
Cam-Type SNAP-LOCK technology
Three mounting styles available: Standard, Wide and Long
Built for Navy / Marine requirements
Non-corrosive construction with bronze enclosure and stainless steel shaft
EA780 sliding type contacts and EA790 butt type contacts
EA780-790

Technical Data
and Ratings

EnclosureMeets NEMA Types 1, 4, 4X, 6, 6P and 13
ContactsSilver alloy contacts with latched shifting mechanism
Temperature range-20°C to +90°C
Operating leverAdjustable by 7°30' increments through 360°
Continuous Current Rating - Amperes
EA780 EA790
Volts
EA780 AC
EA780 DC
EA790 AC
EA790 DC
125
10
2.5
20
5
250
7.5
0.75
15
1.5
480
5
10
10
5
600
2.5
5
5
2.5
75-100% Power Factor
Trip torque6 to 33 lb-in depending on switch size and cam selected
FormForm "Z" contact arrangement
OptionsHigh temperature and low temperature components and lubricants
Weight2 lb. 11 oz.
Typical Cams

Typical Cams

The versatility of the Snap-Lock mechanism is achieved with the use of a series of uniquely designed cams.

Cam type
Combination B1/B2 CAM

Built into the standard switch for B1 single action CW, B1 single action CCW and B2 double action CW & CCW sequences.

Cam type
Neutral Position N CAM

Designed for applications requiring a neutral position. Both lever and cam are spring returned to starting position.

Cam type
Maintained Position CAM

Available for maintained contacts with one-direction or either-direction operation depending on the cam selected.

Operational Data
EA780/790 Series

EA780 Series & EA790 Series - B1 CAM, B2 CAM

EA780 Series & EA790 Series - B1 CAM, B2 CAM
Operational Data

EA780 Series & EA790 Series - B1 CAM, B2 CAM

A. Trip Travel
18°
B. Reset Travel
14°
C. Recommended Travel
30°
D. Maximum Travel Available
90°
Torque 1NO/1NC
15 lb-in.
Torque 2NO/2NC
27 lb-in.
EA790 Series - B9 CAM (Short Travel)
Operational Data

EA790 Series - B9 CAM (Short Travel)

A. Trip Travel
13°
B. Reset Travel
10°
C. Recommended Travel
30°
D. Maximum Travel Available
90°
Torque 1NO/1NC
15 lb-in.
Torque 2NO/2NC
27 lb-in.
EA790 Series - N1 CAM
Operational Data

EA790 Series - N1 CAM

A. Trip Travel
18°
31°
B. Reset Travel
14°
22°
C. Recommended Travel
30°
45°
D. Maximum Travel Available
90°
90°
Torque 2NO
15 lb-in.
19.5 lb-in.
Torque 4NO
16.5 lb-in.
16.5 lb-in.
Torque 2NC
15 lb-in.
15 lb-in.
Torque 4NC
16.5 lb-in.
16.5 lb-in.
EA780 & EA790 Series - M CAM and M7 CAM
Operational Data

EA780 & EA790 Series - M CAM and M7 CAM

A. Trip Travel
25°
55°
B. Reset Travel
25°
22°
C. Minimum Travel to Maintain
54°
55°
D. Recommended Travel
60°
60°
E. Maximum Travel Available
124°
116°
F. Overall Travel
56°
64°
Torque 1NO
6 lb-in.
Torque 1NC
9 lb-in.
Torque 2NO
6 lb-in.
Torque 2NC
9 lb-in.
EA780 & EA790 Series - M7 CAM
Operational Data

EA780 & EA790 Series - M7 CAM

A. Trip Travel
16°
30°
B. Reset Travel
30°
26°
C. Minimum Travel to Maintain
26°
30°
D. Recommended Travel
45°
45°
E. Maximum Travel Available
90°
90°
Torque 1NO
12 lb-in.
Torque 1NC
13.5 lb-in.
Torque 2NO
15 lb-in.
Torque 2NC
16.5 lb-in.
Contact Configuration

Operation tables and circuit arrangements

Operation direction, initial position and circuit labels are preserved as a separate reference block.

Contact configuration
CW & CCW Operation

Shown for 1NO/1NC and 2NO/2NC circuits with both clockwise and counterclockwise operation tables.

Contact configuration
CCW Operation Only

Shown for configurations that switch only in counterclockwise operation and return to initial position.

Contact configuration
CW Operation Only

Shown for configurations that switch only in clockwise operation and use the same contact labels.

The PDF shows the contact logic for CW & CCW operation, CCW operation only, CW operation only, and the 1NO/1NC, 2NO/2NC, 4NO, and 4NC circuit diagrams.
Dimensions & Mounting

All dimensions given in Inches.

Standard Wide Long

All dimensions are shown in inches. The drawing sheet covers the standard, wide, and long mounting styles and then identifies the EA780 sliding type and EA790 butt type contact families.

Drawing details

The dimensions include the standard mount body, 48 serrations, pipe tap area, the .495 / .490 O.D. note and the wider long-mount envelope.

How to read it

Start with the mounting style, then confirm the contact type, then verify the width, height and pipe tap values against the enclosure cutout.

Reference panel
EA780 Series Sliding, Double Break Contacts
Standard Mounting
Related drawing and mounting notes
1
EA780 Series Sliding, Double Break Contacts

Standard mounting view showing the body envelope, pipe tap location, 48 serrations, and the outline dimensions used on the PDF sheet.

A = 2.62 in (66.5 mm)B = 3.19 in (81.0 mm)C = 2.25 in (57.1 mm).495 / .490 O.D.
PDF section detail
EA780: Sliding, double break contacts
EA790: Butt, double break contacts
Mounting: Standard / Wide / Long
Contact types: 1NO/1NC, 2NO/2NC, 2NO, 2NC, 4NO, 4NC
Ordering Information

Build the part number

For additional EA780 Series options, consult factory. For additional EA790 Series options, consult factory.

EA780 -
Rotation / Product Variation / Operation / Contact Type, Mounting Style
Rotation
0 - CW or CW & CCW; 1 - CCW
Product Variation
CAM Type
0 - B1 CAM1 or M CAM2
1 - B2 CAM1
7 - M7 CAM2
Operation
0 - Standard
6 - Maintained
Contact Type, Mounting Style
1 - 1NO/1NC or 2NO or 2NC, Standard Mounting
2 - 2NO/2NC or 4NO or 4NC, Standard Mounting
4 - 1NO/1NC or 2NO or 2NC, Wide Mounting
5 - 2NO/2NC or 4NO or 4NC, Wide Mounting
7 - 1NO/1NC or 2NO or 2NC, Long Mounting
8 - 2NO/2NC or 4NO or 4NC, Long Mounting
Notes: B1 CAM and B2 CAM only available with Standard Operation. M CAM and M7 CAM only available with Maintained Operation. CW Rotation and CCW Rotation only available with B1 CAM Type.
EA790 -
Rotation / Product Variation / Operation / Contact Type, Mounting Style
Rotation
0 - CW4 or CW &CCW5
1 - CCW4
2 - Neutral (4NO)5
4 - Neutral (4NC)5
Product Variation
CAM Type
0 - B1 CAM1 or M CAM2
1 - B2 CAM1 or N1 CAM (4NO or 4NC)3
7 - M7 CAM2 or N1 CAM (2NO)3
8 - N1 CAM (2NC)3
9 - B9 CAM (Short Travel)1
Operation
0 - Standard
5 - Neutral
6 - Maintained
Contact Type, Mounting Style
1 - 1NO/1NC or 2NO or 2NC, Standard Mounting
2 - 2NO/2NC or 4NO or 4NC, Standard Mounting
4 - 1NO/1NC or 2NO or 2NC, Wide Mounting
5 - 2NO/2NC or 4NO or 4NC, Wide Mounting
7 - 1NO/1NC or 2NO or 2NC, Long Mounting
8 - 2NO/2NC or 4NO or 4NC, Long Mounting
Notes: B1 CAM and B2 CAM only available with Standard Operation. M CAM and M7 CAM only available with Maintained Operation. N1 CAM only available with Neutral Operation.

Need Technical Assistance?

Contact our engineering team for datasheets and integration support.