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Question
The calculation for circuit earth fault loop impedance is
(A) Zs = Ze + R1 + R2
(B) Ze = Zs – R1 + R2
(C) Zs = Ze + R1 + Rn
(D) Ze = Zs + R1 + R2
Answer
This answer is hidden. It contains 14 characters.
Related questions
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Doing good journalistic work often means that a journalist contributes to causing some sort of harm.
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Q:
The maximum permitted disconnection time for a 20A radial circuit connected to a TN-S system is
(A) 0.4 sec
(B) 5 sec
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Q:
State one situation within a domestic installation which would require the installation of an RCD
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A special location which may be connected to a TN-C-S system is
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The purpose of an initial verification as described in GN3 is
(A) To confirm by inspection and test that the installation complies with the design and construction aspects of BS 7671
(B) To confirm by inspection and test that the installation complies with the design and construction aspects of EAWR 1989
(C) That it works correctly and is compliant with GN3
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Q:
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Legacy Media are products that predate the internet.
(A) True
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Patch is dedicated to what type of coverage?
(A) Sports
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Which is not a trend in journalism in recent years?
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Investigative journalism has been…
(A) increasing at news outlets in recent years
(B) decreasing at news outlets in recent years
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Two special locations which are divided into zones are
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In the dual-product model, generally,
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Q:
The maximum tabulated Zs for a protective device as shown in BS 7671 is 1.44Ω, the maximum permissible measured Zs will be
(A) 1.44Ω
(B) 1.43Ω
(C) 1.15Ω
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Q:
Additional protection will be required for
(A) Circuits which cannot meet the required disconnection time
(B) A lighting circuit in a room containing a bath or a shower
(C) Installations where there is no protective bonding
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Q:
When a test on a cable is carried out using a low resistance ohmmeter the value provided by the instrument will be in
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The title given in law to the person carrying out periodic inspections is
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