Testing Ethernet In-store Wiring

This section contains information that is to be used to test the Ethernet in-store wiring for proper installation.

There are three types of Ethernet wire tests that are intended to ensure that the transmit and receive pairs are correctly installed and do not exceed the maximum permissible cable length:

CASE A: Transmit Pair Continuity Tests

CASE B: Receive Pair Continuity Tests

CASE C: Phasing Between Transmit Pair and Receive Pair

There are two types of Ethernet wire tests that check the phasing of the transmit pair and the receive pair.

CASE D: Transmit Pair Phasing

CASE E: Receive Pair Phasing

Included in this section are assembly instructions for special wall boxes and instructions for their use in combination with ohmmeters to test Ethernet wire.

To construct these boxes, you need to use two standard Ethernet wall boxes (Wall Box Feature Kit 1008-A077).

To modify these boxes, you need the following equipment:

Quantity	Item	Part Number
1	Wire Insertion Tool	NCR P/N 603-9009892 or AMP 552714-3
6" (14.5cm)	#22 AWG wire
2	76 cm (2.5 ft) patch cord	D8W
3	Wall boxes	NCR 1008-A077 (250-0034057)
3	1N4001 diodes	NCR 007-9812817 or Radio Shack 276-1101
Misc	. Store Ethernet wiring chart

Note:  Proper wire phasing can also be determined by noting the wire color coding as connected to the Y and BK and the BU and R connectors in the junction and wall boxes.

Note:  An analog meter is easier to work with when looking for diode polarity. Digital meters may give conflicting results when in the ohms range. Some digital meters have a special diode range that measures open line in the reverse direction and forward voltage in the other. This type of digital meter range is preferred.