P6002ACMC datasheet(144/212 Pages) TECCOR

144 / 212 page

UL 60950 3rd Edition (formerly UL 1950, 3rd edition)

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SIDACtor® Data Book and Design Guide

Overvoltage Flowchart

The overvoltage flowchart in Figure 4.5 shows specific guidelines for determining

overvoltage requirements applicable to specific designs.

Figure 4.5 Overvoltage Flowchart

Yes

100 A2-S

Limiting1

No Overvoltage Testing

Connects to Outside Cable

Yes

1.3 A

Limiting2

26 AWG

Line Cord3

Yes

Pass 1

Yes

Pass 6.1.24

Fire Enclosure

and Spacings5

Yes

Acceptable

Fire

Enclosure

Yes

Pass 5

Pass 26

Pass 3, 47

Yes

Not

Acceptable

Notes:

1. Current Limiting — Equipment that has a method for limiting current to an I2t rating of 100A2s

2. Current Limiting — Equipment that has a method for limiting current to 1.3 A max steady state

3. 26 AWG Line Cord — Minimum 26 American Wire Gauge (AWG) telecommunications line cord either supplied with the

equipment or described in the safety instructions

4. Clause 6.3.3 — The telephone line must be adequately isolated from earth for the operating mode being considered and

at a voltage of 120 V rms. Refer to Section 6.1.2 of UL 60950.

5. Fire Enclosure and Spacing — Fire enclosures minimize fire hazards by containing any emission of flame, molten metal,

flaming drops, or glowing particles that could be emitted by the equipment under fault conditions. Fire enclosure

construction is covered in Section 4.4.6 of UL 60950. Spacing applies to parts in the TNV circuits that might ignite under

overvoltage conditions. Spacing requirements mandate that parts be separated from internal materials of flammability

class V-2 or lower, by at least 25 mm of air or a barrier material of flammability class V-1 or better. Parts also should be

separated from openings in the top or sides of the enclosure by at least 25 mm of air or a material barrier.

6. Test Condition 2 is not required for equipment with 1.3 A limiting.

7. Test Conditions 3 and 4 are not required for connections limited to outside cable less than 1,000 m.

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