Table 6-2 (Army) SEPARATION DISTANCE BETWEEN OUTDOOR INSULATED TRANSFORMERS and BUILDINGS

UFC 3-600-01

17 April 2003

with change 16 January 2004

Table 6-1 (Navy and Air Force)

SEPARATION DISTANCE BETWEEN OUTDOOR INSULATED TRANSFORMERS

and BUILDINGS

Horizontal Distancea

Fire

Non-

Vertical

Resistant

Combustible Combustible

Liquid Volume Construction Construction Construction Distance

Liquid

gal (m)

ft (m)

Less

<1,000 (3.8)

5 (1.5)

25 (7.6)

Flammable

>1,000 (3.8)

15 (4.6)

50 (15.2)

<500 (1.9)

5 (1.5)

15 (4.6)

25 (7.6)

Mineral Oil

500 5,000

15 (4.6)

25 (7.6)

50 (15.2)

(1.9 19)

>5,000 (19)

25 (7.6)

50 (15.2)

100 (30.5)

a

If FM Approved transformers are used, the separation distances shall follow the

requirements of FM Global Loss Prevention Data Sheet 5-4, Transformers, which

allows for reduced separation distances.

Table 6-2 (Army)

SEPARATION DISTANCE BETWEEN OUTDOOR INSULATED TRANSFORMERS

and BUILDINGS

Horizontal Distancea

Fire

Non-

Vertical

Transformer

Resistant

Combustible Combustible

Construction Construction Construction Distance

Rating

Liquid

kVA

ft (m)

Less

<2000

5 (1.5)

25 (7.6)

Flammable

>2000

15 (4.6)

50 (15.2)

Mineral Oil

5 (1.5)

15 (4.6)

25 (7.6)

<1000

(transformers

made after 1970

except zigzag-

>1000

15 (4.6)

25 (7.6)

50 (15.2)

type)

<650

5 (1.5)

15 (4.6)

25 (7.6)

Mineral Oil

650 6500

15 (4.6)

25 (7.6)

50 (15.2)

(transformers

made before

1970 & zigzag-

>6500

25 (7.6)

50 (15.2)

100 (30.5)

type)

a

If FM Approved transformers are used, the separation distances shall follow the

requirements of FM Global Loss Prevention Data Sheet 5-4, Transformers, which

allows for reduced separation distances.

6-27.2.2.2.1.1

When the separation distance in Table 6-1 or Table 6-2

cannot be met, the following applies:

63