INTELLIGENT SOCKET TESTERKEW 4506
Perfect socket tester that ﬁnds out thediﬃcult-to-detect N-E Reverse connection!
●Easy measurement by simply plugging into asocket outlet and pressing the test button●In only 1 second you can check voltage, correct

wiring and polarity of Line, Neutral and Earth of asocket outlet●KEW 4506 can be used on TT earth system,

and also on TN-S by combined use with KEW 8343
(See measurement principle)●Unique measurement methodwith low test current for avoiding tripping of RCDs

SIGNAL SOURCEFOR INTELLIGENT SOCKET TESTERKEW 8343

INTELLIGENT SOCKET TESTERKEW 4506

Why is Neutral-Earth Reverse connection a problem?
If an socket outlet with wrong wiring (N-E Reverse) is used, the upstream side of RCD will trip and cause power
outage. In addition, if the circuit isn t protected by RCD, large load current flows in the Earth conductor andmay cause electric shock and fire hazard.

Judgement by a multimeter
When measuring with a multimeter, even if N and E are connected inreverse, the voltage will be the same as when they are connected
correctly, and miswiring cannot be found.

NRN

RE1Source
Earth230V

230V

RL

RE2Consumer sEarth0V

EL

E230V0VL
N

Our intelligent
socket tester,
KEW 4506, cansolve thoseproblems!

230V

Measurement principle
For TT system
If the Earth system is TT and the circuit is protected by an RCD with rated current of 30mA or more, N-E
Reverse can be detected by KEW 4506 alone.
In this case, to check if the N-E wiring is correct, KEW 4506 measures the resistance between L-N and theresistance between L-E respectively.
Normally in TT system, the L-N resistance is mainly due to the wiring conductors resistance only. On the otherhand, the L-E resistance includes also the consumer earth resistance (RE1 and RE2), so the L-E resistance ishigher than just the L-N resistance.
RL+RN < RL +(RE1+RE2)
RL
KEW 4506 detects N-E Reverse checking the difference of
these resistance values.
Therefore, if the L-E resistance is extremely low, theReverse connection of N-E may not be detected.
RNAlso, a 10mA RCD may trip because a test current around
10mA is used to measure the resistance.
RE1In above cases, we suggest to use KEW 8343 (SignalRE2source) together with KEW 4506. It will not be influenced by
the extremely low L-E resistance and any RCDs will not trip
SourceConsumer sEarthEarth
as the test current flowing between N-E is less than 1μA.

For TN system
To test wiring systems with low resistances such as TN,building structure, and common earth systems, connect
KEW 8343 to the location close to the branch circuit
breaker to which 3P outlet under test is wired and applytest voltage.
N-E Reverse can be detected by applying a test voltage
from KEW 8343 into the neutral line and examining thedirection of the signal.
*KEW 4506 and KEW 8343 cannot be used on TN-C or IT systems.
*Signal Source KEW 8343 is sold separately.

LNE

All test results and PASS/FAIL in a clear display screen
Wiring check with the live circuit condition
L-N voltage andN-E resistance atTT system canbe displayed.

KEW 4506 has amode which candetect the wiring
connection
avoiding any
RCD tripping.
*resistancemeasurementOFFNon-connect
can be also
displayed.

Wiring check for2P(no earth)outlet is alsoavailable byselecting the 2P
setting.
*2P conversion
adapter which isrequired toconnect with 2P
outlet isn t
supplied.

Easy measurement by simply
plugging into a socket outlet
and pressing the test button.

LCD backlight automaticallyturns on at the dark place.
*It is possible to disable backlight

Where to use and limitations
KEW 4506 can test the wiring connection including the N-E Reverse of
single-phase socket outlets.
This tester can test single phase socket outlets wired to Three-phase
4-Wire, Single-phase 3-Wire, Single-phase 2-Wire supply systems.
*KEW 4506 cannot be used for checking three-phase socket outlets and testing the RCD.

RCD

✓Judgeable × Unjudgeable

RCD

RCD

RCD

RCD

RCD

For use in a general TN system circuit, N-E Reverse can be determined
only at socket outlets connected downstream of the N conductor where
KEW 8343 is clamped.
For checking Ring Circuit socket outlets, KEW 8343 must be connected tothe upstream of the N conductor which supplies the ring circuit.

If N and E are connected each other inthe circuit downstream to KEW 8343,
KEW 4506 cannot work properly.

● KEW 4506 Specification
Socket test*● Accessories for KEW 4506

1

Measurable rangeof power supply
voltage
Socket type
PASS

Judgement

FAIL

80 to 290V rms (50/60Hz)*The tester gives voltage warning if 253V orhigher voltage is detected but it can perform
socket test.
3 PolePASS
L-N Reverse
L-E Reverse
N-E Reverse
E Not connected
N Not connected
N-E unjudgeable
Abnormal voltage

2 PolePASS
L-N Reverse
Abnormal voltage-KAMP10 or 7284
Test lead withIEC connector
KAMP10 1,500ｍｍ
7284
720ｍｍ

AC V (L-N)
80 to 290V rms (50/60Hz)
Range±2%rdg±4dgt
Accuracy
Loop resistance (N-E)
200Ω: 0.0 to 199.9Ω
Range (Auto-ranging)2000Ω: 200 to 1999Ω
Test current
Accuracy
Applicable Standards

9161
Carrying caseApplicable to the socket outlet
types of each country

200Ω: 5mA (5.3 Hz)
2000Ω: 1mA (5.3 Hz)±3%rdg±5dgt
IEC 61010-1, IEC 61010-2-030 CAT Ⅱ 300V
Pollution degree 2, IEC 60529(IP40)

Operating Temp.& humidity range -10 to 50℃, RH 85% or less(no condensation)Storage Temp. & humidity range -20 to 60℃, RH 85% or less(no condensation)
Power source
LR6 (AA)(1.5V) × 2
212(L) × 56(W) × 39(D) mmDimension
Approx. 250g (including batteries)
Weight
Test lead with IEC connector
9161 (Carrying case)
Accessories
LR6 (AA) × 2, Instruction manual
Optional Accessories 8343(Signal Source for Intelligent Socket Tester)

AUEU

UK

US

KAMP 10(AU): Australian plug
KAMP 10(EU): European SCHUKO plug
KAMP 10(UK): British plug(13A)
7284: American(NEMA)plug*1 If N-E resistance measurement function is turned off*2, test is performed with a test
voltage applied from an optional signal source only: current flows between N-E is less than 1µA.
*2 If the function is disabled, KEW 4506 doesn t show resistance between N-E.

● KEW 8343 Specification
Conductor size
φ24mm max.
Approx. 1.8kHz
Freq.
Test voltage
TRMS Approx. 20mV rms
Allowable input range 300V AC rms(50/60Hz) continuous 100A AC (50/60Hz) continuous
Operating Temp.& humidity range -10 to 50℃, RH 85% or less(no condensation)
Storage Temp. & humidity range -20 to 60℃, RH 85% or less(no condensation)
LR6 (AA)(1.5V) × 6
Power source
IEC 61010-1, IEC 61010-031, IEC 61010-2-032
Applicable Standards CAT Ⅲ 300V Pollution degree 2,IEC 60529(IP40)
Unit: 112(L) × 61(W) × 42(D) mm
Dimension
Test voltage injection clamp: 100(L) × 60(W) × 26(D) mm
Cable length: Approx. 1.5m
WeightApprox. 520g (including batteries)
7157B (Alligator clips)
Accessories
9096 (Carrying case)LR6 (AA) × 6, Instruction manual● Accessories for KEW 8343

●This leaflet was produced in December 2023. The contents of this leaflet are subject to change without notice.

7157B
Alligator clips

9096
Carrying caseLC̲4506̲8343̲2̲0̲Dec23̲SS̲en