11.2.2.3.1-1 Access

Control access should not be impeded by any position of an adjacent control.

Additional Information: Figure 11.4 and Table 11.5 show recommended minimum separation distances for controls. In most cases, control room operations will require greater separation.0700

 

Figure 11.4 Measurement Of Minimum Separation Between Controls

(distances shown in Table 11.5)

 

 

 

 

Table 11.5 Minimum Separation Distances For Controls (See Figure 11.4)

 

 

Type of Control

Minimum Separation in inches and (mm)

Key- operated controls

 

Pushbuttons

 

Pushbutton arrays

 

Legend switches

Slide switches, rocker

switches

 

Toggle switches

 

Thumb- wheels

Rotary selector switches

Continuous rotary controls

J-

handles (large)

J-

handles (small)

Key-operated

1.0

0.5

1.5

1.0

0.75

0.75

0.5

0.75

0.75

5.0

2.0

Controls

(25)

(13)

(38)

(25)

(19)

(19)

(13)

(19)

(19)

(127)

(50)

Pushbuttons

0.5

0.5

2.0

2.0

0.5

0.5

0.5

0.5

0.5

6.0

3.0

(13)

(13)

(50)

(50)

(13)

(13)

(13)

(13)

(13)

(152)

(76)

Pushbutton

1.5

2.0

2.0

2.0

1.5

1.5

1.5

2.0

2.0

6.0

3.0

arrays1

(38)

(50)

(50)

(50)

(38)

(38)

(38)

(50)

(50)

(152)

(76)

Legend

1.0

2.0

2.0

2.0

1.5

1.5

1.5

2.0

2.0

6.0

3.0

switches2

(25)

(50)

(50)

(50)

(38)

(38)

(38)

(50)

(50)

(152)

(76)

Slide

 

 

 

 

 

 

 

 

 

 

 

switches,

0.75

0.5

1.5

1.5

0.5

0.75

0.5

0.5

0.5

5.0

2.0

rocker

(19)

(13)

(38)

(38)

(13)

(19)

(13)

(13)

(13)

(127)

(50)

switches

 

 

 

 

 

 

 

 

 

 

 

Toggle

0.75

0.5

1.5

1.5

0.75

0.75

0.5

0.75

0.75

6.0

3.0

switches3

(19)

(13)

(38)

(38)

(19)

(19)

(13)

(19)

(19)

(152)

(76)

Thumbwheels

0.5

0.5

1.5

1.5

0.5

0.5

0.5

0.75

0.75

5.0

2.0

(13)

(13)

(38)

(38)

(13)

(13)

(13)

(19)

(19)

(127)

(50)

Rotary selector

switches

0.75

(19)

0.5

(13)

2.0

(50)

2.0

(50)

0.5

(13)

0.75

(19)

0.75

(19)

1.0

(25)

1.0

(25)

5.0

(127)

2.0

(50)

1   Pushbuttons within an array, 19 cm (0.75 in.) center to center.

2   Legend switches within an array, no minimum distance, but should be separated by a barrier. Barrier should be at least 0.125-in. wide, 0.183-in. high, with rounded edges. Legend switches manufactured as elements of a module or modular array may be mounted as closely as engineering consideration permits.

3   Toggle switches arrayed in a horizontal line, 19 cm (0.75 in.) center to center