Symptoms

Circuit Symptoms

ID Symptom Condition
0Unable to carry out test(s). {0000}Raised on a ring main circuit if all ring main results (R1, Rn, R2) and insulation resistance results (PN, PE, NE) are marked 'UTT', and the circuit fuse type is marked as 'UNABLE_TO_GAIN_ACCESS' or 'UNKNOWN'.
1Unable to carry out test(s). {0001}Raised on a sub-main or radial circuit if all insulation resistance results (PN, PE, NE) are marked 'UTT', and the circuit fuse type is marked as 'UNABLE_TO_GAIN_ACCESS' or 'UNKNOWN'
2Unable to carry out test(s). {0002}Raised as a coverall if multiple UTT faults detected. Faults 1,12,15,17,25,26,163 are judged as UTT faults.
3Low insulation resistance reading(s). {0003}Raised if any required Insulation Resistance result is lower than 1 Ohm
6Unable to carry out earth loop test(s) (R2 only). {0006}Raised on a ring main circuit if R1 + R2 = UTT/NA, R2 > 0.01, and ZS = UTT
7No CPC. {0007}One or more cable has a missing earthing conductor (NONE / NA/ NONE_ALL_INSUL)
8CPC not continuous. {0008}All earthing conductors are present, but No was recorded under CPC Continuous Throughout Circuit
9Protective device None Fitted. {0009}Protective device is marked "None fitted"
10Protective device breaking capacity too low. {0010}The let-through current of an upline protective device exceeds the breaking capacity of this protective device.
12Unable to carry out ring main continuity test(s) . {0012}All ring main continuity results are marked UTT and all circuit phase cables are twin and earth (6242_3Y).
15Unable to carry out polarity test(s). {0015}Raised on a circuit if the polarity is marked UTT.
15aPolarity incorrect. {0015a}Raised on a circuit if the polarity is marked FAIL.
17Unable to carry out insulation resistance test(s). {0017}One or more Insulation Resistance result is marked UTT. PE is ignored when no earth cable present.
25Unable to carry out cpc continuity test(s). {0025}Raised on a circuit if all CPC Continuity Throughout Circuit is UTT or NA. Not raised if fault 6 is detected on the same circuit. Not raised if download board changes earthing to TT and is marked "upstream earthing isolated".
26Unable to carry out earth loop test(s). {0026}Raised on a circuit if R1 R2 and ZS are marked UTT. Not raised if fault 0006 is detected on the same circuit.
28Continuity high on ring main (voltage drop). {0028}Raised on a ring main circuit if both R1 and Rn > 0.73
29Continuity high on ring main (Rl). {0029}Raised on a ring main circuit if R1 is at least 10% higher than RN.
30Continuity high on ring main (Rn). {0030}Raised on a ring circuit if RN is at least 10% higher than R1.
32Continuity high on ring main (R2). {0032}Raised on a ring circuit if: R2 > max * y * 1.1 where:
  • max = the maximum ratio of live to earth csa on the circuit cables
  • y = min (R1,RN) or R1 if RN is zero
33Circuit Description = 'Not tested'. {0033}Raised if the circuit is marked Not Tested.
35Circuit Description = 'Unknown' or 'Untraced'. {0035}Raised if the circuit is marked Unknown or Untraced.
36Sub category = '?'. {0036}Raised on a circuit if the fuse breaking capacity is recorded but the subtype is unknwon.
37Short circuit capacity = UTT. {0037}Raised on a circuit if the fuse breaking capacity is UTT, but the subtype is known.
38MCCB Device Observations. {0038} Faults 38 to 46 are raised if the minimum current required to activate all fuses in all upline fuseways exceeds the minimum current capacity of all cables on this circuit, and either:
  • the maximum downline load on this circuit could not be determined
  • the maximum downline load on this circuit exceeds the minimum current capacity of all cables on this circuit
39Protective Device Observations. {0039}
40Protective Device Observations. {0040}
41Protective Device Observations. {0041}
42Protective Device Observations. {0042}
43MCCB Observations. {0043}
44Protective Device Observations. {0044}
45MCCB Observations. {0045}
46Protective Device Observations. {0046}
51Protective Device Observations {0051} Raised on a circuit if the measured circuit ZS is determined to exceed the minimum derated value required to activate any of the upline protective devices within the disconnection time of this circuit as required by BS7671.
52Protective Device Observations {0052}Raised on a circuit if the measured circuit ZS is determined to exceed the minimum UNDERATED value required to activate any of the upline protective devices within the disconnection time of this circuit as required by BS7671.
56Protective Device Observations {0056} Fuse is marked “Unable to gain access” or “Unknown”.
108_cRCD operation failed (circuit). {0108}Protective device 61009/60898_4293/3871_4293 with no time delay: dn > 300
108_fwRCD operation failed (fuseway). {0108}
109cRCD operation failed (circuit). {0109}Protective device 61008 with no time delay: dn > 300
109fwRCD operation failed (fuseway). {0109}
112zRCD operation failed (socket). {0112z}Protective device 7288 with no time delay: dn > 200
114cRCD operation failed (circuit). {0114}Protective device 61009/60898_4293/3871_4293 with time delay: 0 <= dn < 130
114fwRCD operation failed (fuseway). {0114}
115cRCD operation failed (circuit). {0115}Protective device 61008 with time delay: 0 <= dn < 130
115fwRCD operation failed (fuseway). {0115}
118cRCD operation failed (circuit). {0118}Protective device 61009/60898_4293/3871_4293 with time delay: dn > 500
118fwRCD operation failed (fuseway). {0118}
120cRCD operation failed (circuit). {0120}Protective device 61008 with time delay: dn > 500
120fwRCD operation failed (fuseway). {0120}
122cRCD operation failed (circuit). {0122}Protective device 4293/Vigiunit with time delay: 0 < dn < 200 + (delay * 0.5)
122fwRCD operation failed (fuseway). {0122}
124cRCD operation failed (circuit). {0124}Protective device 4293/Vigiunit with time delay: dn > 200 + (delay * 0.5)
124fwRCD operation failed (fuseway). {0124}
126cRCD operation failed (circuit). {0126}Protective device 61009/60898_4293/3871_4293: sensitivity < 30mA, and 40 < 5dn < 45
126fwRCD operation failed (fuseway). {0126}
130cRCD operation failed (circuit). {0130}Protective device 4293/Vigiunit: sensitivity < 30mA, and 40 < 5dn 45
130fwRCD operation failed (fuseway). {0130}
130zRCD operation failed (socket). {0130z}Protective device 7288 : sensitivy <= 30mA, and 40 < 5dn <= 45
132cRCD operation failed (circuit). {0132}Protective device 61009/60898_4293/3871_4293: sensitivity < 30mA, and 5dn > 45
132fwRCD operation failed (fuseway). {0132}
134cRCD operation failed (circuit). {0134}Protective device 61008: sensitivity < 30mA, and 5dn > 45
134fwRCD operation failed (fuseway). {0134}
136cRCD operation failed (circuit). {0136}Protective device 4293/Vigiunit: sensitivity < 30mA, and 5dn > 45
136fwRCD operation failed (fuseway). {0136}
160Protective device unknown. {0160}Fuse is marked "DNO cut out sealed".
162Subtype and breaking capacity unknown. {0162}Raised on a circuit if the fuse breaking capacity is UTT but the subtype is unknown.
163Zs is UTT. {0163}Raised on a circuit if the CPC is continuous, all earth cables are preset, ZS is marked UTT, and fault 0006 is NOT raised.
201CPC may be undersized. {0201}Earth cable fails on tabulated value (tabulated value only available)
202CPC is undersized. {0202}Earth cable fails on adiabatic value (adiabatic value only available)
203CPC may be undersized. {0203}Earth cable fails on tabulated value (tabulated value only available)
204CPC is undersized. {0204}Earth cable fails on both tabulated and adiabatic
205Protective Device Observations. {0205}Raised on a ring main circuit if the protective device has a nominal rating of more than 32 A.
206fwUnable to test operation of fuseway RCD. {0206}Raised on a fuseway RCD if any of the tripping times are recorded as UTT.
207cUnable to test operation of circuit RCD. {0207}Raised on a circuit RCD if any of the tripping times are recorded as UTT.
211Main earth (TT) is undersized. {0211}CSA of earth conductor fails Table 10C (assumes copper)

Board Symptoms

ID Symptom Condition
9Protective device None Fitted. {0009_rcd1}Protective device is marked "None fitted"
9Protective device None Fitted. {0009_rcd2}
36Sub category = '?'. {0036_rcd1}Protective device breaking capacity is recorded but subtype is marked Unknown.
36Sub category = '?'. {0036_rcd2}
37Short circuit capacity = UTT. {0037_rcd1}Protective device breaking capacity is UTT and the subtype is NOT marked Unknown.
37Short circuit capacity = UTT. {0037_rcd2}
56Protective Device Observations {0056_rcd1}Fuse is marked Unable to Gain Access or Unknown.
56Protective Device Observations {0056_rcd2}
100aExposed conductive part. {0100a}Steel clad board fed directly from the site TT supply.
100bExposed conductive part. {0100b}Steel clad board that defines its own TT supply.
100cExposed conductive part. {0100c}Steel clad board fed via a cable connection block from a TT supply
107Earth rod resistance too high. {0107}Earth rod resistance is > 200 Ohms
107bNo means of earthing. {0107b}Earthing arrangements are TT and "None" is selected for means of earthing
107dDetails of the earth electrode unknown. {0107d}Means of earthing is installation earth electrode but "Unknown" is selected under Details of the Earth Electrode
108RCD operation failed. {0108}Protective device 61009/60898_4293/3871_4293 with no time delay: dn > 300
110RCD operation failed. {0110}
109RCD operation failed. {0109}Protective device 61008 with no time delay: dn > 300
111RCD operation failed. {0111}
112RCD operation failed. {0112}Protective device 4293/Vigiunit with no time delay: dn > 200
113RCD operation failed. {0113}
114RCD operation failed. {0114}Protective device 61009/60898_4293/3871_4293 with time delay: 0 <= dn < 130
116RCD operation failed. {0116}
115RCD operation failed. {0115}Protective device 61008 with time delay: 0 <= dn < 130
117RCD operation failed. {0117}
118RCD operation failed. {0118}Protective device 61009/60898_4293/3871_4293 with time delay: dn > 500
119RCD operation failed. {0119}
120RCD operation failed. {0120}Protective device 61008 with time delay: dn > 500
121RCD operation failed. {0121}
122RCD operation failed. {0122}Protective device 4293/Vigiunit with time delay: 0 < dn < 200 + (delay * 0.5)
123RCD operation failed. {0123}
124RCD operation failed. {0124}Protective device 4293/Vigiunit with time delay: dn > 200 + (delay * 0.5)
125RCD operation failed. {0125}
126RCD operation failed. {0126}Protective device 61009/60898_4293/3871_4293: sensitivity < 30mA, and 40 < 5dn < 45
127RCD operation failed. {0127}
128RCD operation failed. {0128}Protective device 61008: sensitivity < 30mA, and 40 < 5dn < 45
129RCD operation failed. {0129}
130RCD operation failed. {0130}Protective device 4293/Vigiunit: sensitivity < 30mA, and 40 < 5dn 45
131RCD operation failed. {0131}
132RCD operation failed. {0132}Protective device 61009/60898_4293/3871_4293: sensitivity < 30mA, and 5dn > 45
133RCD operation failed. {0133}
134RCD operation failed. {0134}Protective device 61008: sensitivity < 30mA, and 5dn > 45
135RCD operation failed. {0135}
136RCD operation failed. {0136}Protective device 4293/Vigiunit: sensitivity < 30mA, and 5dn > 45
137RCD operation failed. {0137}
138RCD operation failed. {0138}TT site, installation earth electrode: (sensitivity /1000) * electrode resistance to earth > 50
139RCD operation failed. {0139}TT board, installation earth electrode: (sensitivity /1000) * electrode resistance to earth > 50
140aBonding error. {140a}Faults 140a, 141a, .. 147a are raised if bonding is present but not carried out.
141aBonding error. {141a}
142aBonding error. {142a}
143aBonding error. {143a}
144aBonding error. {144a}
145aBonding error. {145a}
146aBonding error. {146a}
147aBonding error. {147a}
140bBonding error. {140b}Faults 140b-147b are raised if any earth bonding cable is undersized (TNS/TT)
141bBonding error. {141b}
142bBonding error. {142b}
143bBonding error. {143b}
144bBonding error. {144b}
145bBonding error. {145b}
146bBonding error. {146b}
147bBonding error. {147b}
148Bonding error. {148}Faults 148,149, .. 155 are raised if any earth bonding cable is undersized (TNS)
149Bonding error. {149}
150Bonding error. {150}
151Bonding error. {151}
152Bonding error. {152}
153Bonding error. {153}
154Bonding error. {154}
155Bonding error. {155}
156aBonding error. {156a}Faults 156a, 156b,... 156h are raised if one ore more bonding conductors is neither a separate copper or steelwork
156bBonding error. {156b}
156cBonding error. {156c}
156dBonding error. {156d}
156eBonding error. {156e}
156fBonding error. {156f}
156gBonding error. {156g}
156hBonding error. {156h}
160Protective device unknown. {0160_rcd1}Fuse is marked "DNO cut out sealed".
160Protective device unknown. {0160_rcd2}
162Subtype and breaking capacity unknown'. {0162_rcd1}Protective device breaking capacity is marked UTT and subtype is marked Unknown.
162Subtype and breaking capacity unknown'. {0162_rcd2}Protective device breaking capacity is marked UTT and subtype is marked Unknown.
200Board feed is unknown. {0200}Board feed is marked Unknown
201CPC may be undersized. {0201}Earth cable fails on tabulated value (tabulated value only available)
203CPC may be undersized. {0203}Earth cable fails on tabulated value (tabulated value only available)
204CPC is undersized. {0204}Earth cable fails on both tabulated and adiabatic
208Unable to test operation of board RCD. {0208}One or more tripping times are UTT
209Unable to test operation of board RCD. {0209}
211Main earth (TT) is undersized. {0211}CSA of earth conductor fails Table 10C (assumes copper)
212Earth electrode UTT. {0212}Installation earth electrocode location is UTT

Site Symptoms

ID Symptom Condition
101Isolation of live conductors. {0101}Faults 101-106 are raised if the earthing system is TT and the main switch has fewer poles than the combined number of line and neutral conductors.
102Isolation of live conductors. {0102}
103Isolation of live conductors. {0103}
104Isolation of live conductors. {0104}
105Isolation of live conductors. {0105}
106Isolation of live conductors. {0106}
106aEarth rod resistance too high. {0106a}Earth rod resistance is > 200 Ohms
107aNo means of earthing. {0107a}Earthing arrangements are TT and "None" is selected for means of earthing
107cDetails of the earth electrode unknown. {0107c}Means of earthing is installation earth electrode but "Unknown" is selected under Details of the Earth Electrode
140aBonding error. {140a}Faults 140a, 141a, .. 147a are raised if bonding is present but not carried out.
141aBonding error. {141a}
142aBonding error. {142a}
143aBonding error. {143a}
144aBonding error. {144a}
145aBonding error. {145a}
146aBonding error. {146a}
147aBonding error. {147a}
140bBonding error. {140b}Faults 140b-147b are raised if any earth bonding cable is undersized (TNS/TT)
141bBonding error. {141b}
142bBonding error. {142b}
143bBonding error. {143b}
144bBonding error. {144b}
145bBonding error. {145b}
146bBonding error. {146b}
147bBonding error. {147b}
148Bonding error. {148}Faults 148,149, .. 155 are raised if any earth bonding cable is undersized (TNS)
149Bonding error. {149}
150Bonding error. {150}
151Bonding error. {151}
152Bonding error. {152}
153Bonding error. {153}
154Bonding error. {154}
155Bonding error. {155}
156aBonding error. {156a}Faults 156a, 156b,... 156h are raised if one ore more bonding conductors is neither a separate copper or steelwork
156bBonding error. {156b}
156cBonding error. {156c}
156dBonding error. {156d}
156eBonding error. {156e}
156fBonding error. {156f}
156gBonding error. {156g}
156hBonding error. {156h}
161Supply fuse unknown. {0161}Site protective device is marked DNO_CUT_OUT_SEALED, UNKNOWN, or UNABLE_TO_GAIN_ACCESS.