LAPP North America's current product catalog

Appendix Technical data

Connectors Derating curves

The derating curve indicates the maximum current that can permanently and simultaneously flow through all connections if the component is exposed to ambient temperatures below its upper limit temperature. The upper limit temperature of a component is determined by its material(s). The maximum temperature is calculated from the ambient temperature and from heating due to current loading. It must not exceed the upper limit temperature of the component. The derating of a component is not a constant value, but decreases hand-in-hand with the increase in component ambient temperature. Furthermore, current loading capacity is dependent upon

geometry, the materials employed, the number of poles, and the conductor.

Since it is not advisable to use heavy duty connectors at their loading limits, the base curve is reduced. If the loading currents are reduced to 80%, then this produces the reduced base curve in relation to the various connectors and measurement uncertainties at which temperature measurements are taken into account. Experience shows that use of the reduced base curve data will provide operation over the widest range of connector applications.

Note: only the reduced base curve is reproduced on the following derating curves for inserts.

Recommended torque for EPIC ® assembly screws

Recommended torque metric US

EPIC ® connector assembly part example

Recommended torque metric US

EPIC ® connector assembly part example

Screw size

Screw size

1.84 lb/ft (22.13 lb) 2.21 lb/ft (26.52 lb)

EPIC ® HBE & HA screw terminals, EPIC ® insert mounting screws, EPIC ® guide pin & bushing EPIC ® HD, HDD, HBE & HA ground screw, EPIC ® HBS screw terminal

M5

EPIC ® HBS grounding screw

2.50 Nm

0.59 lb/ft (7.08 lb)

M3

0.80 Nm

MP 80A screw terminal Modular MC2 screw terminal

M6

3.00 Nm

1.11 lb/ft (13.32 lb)

M4

1.50 Nm

Cable outer diameter for PG glands

Exact correspondences between AWG and mm² do not exist. These conversions are approximations to facilitate comparison. For the most accurate cross section, see the specific cable catalog page.

Cable outer diameter range in mm

Cable outer diameter range in mm

PG size

PG size

PG 7 PG 9

0.157 - 0.236 0.157 - 0.433 0.256 - 0.531 0.256 - 0.531 0.256 - 0.630

4.0 - 6.0 4.0 - 11.0 6.5 - 13.5 6.5 - 13.5 6.5 - 16.0

PG 21 PG 29 PG 36 PG 42

0.354 - 0.787 0.669 - 1.102 0.906 - 1.339 1.142 - 1.575

9.0 - 20.0 17.0 - 28.0 23.0 - 34.0 29.0 - 40.0

PG 11 PG 13 PG 16

PG to metric conversion A one-to-one conversion is not possible between PG and metric sizes. The table presented here offers approximate comparisons. LAPP North America continues to support PG and metric components.

PG

Metric

PG 21 29 36 42 48

Metric

7 9

12 16 20

—

32 40 50 63

11 13 16

—

25

for current information see: www.lappusa.com • www.lappcanada.com

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