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BS 546:2025 Table 21 / Figure 19 Minimum GO Gauge for Socket-outlet 15A SC-B5F19-15A

BS 546:2025 Table 21 / Figure 19 minimum GO gauge for socket-outlet 15A

SC-B5F19-15A

Product overview

BS 546:2025 Table 21 and Figure 19 minimum GO gauge for socket-outlet, 15 A three-pin version, model SC-B5F19-15A. It is used together with the maximum GO gauge: the maximum gauge proves that a full-size plug enters, the minimum gauge proves that a plug with minimum pins still engages properly when the contact tubes are at their manufacturing limits. Only when both pass is the insertion space of the socket-outlet acceptable.

Standard: BS 546:2025 Table 21 tabulates U, X, C, D, E, F, O, S and T for the 2 A to 30 A ratings, with O = (X + C)/2, and Figure 19 gives the form of the gauge. This item is the 15 A row.

Test procedure: insert the three pins into the contact tubes; the gauge shall go fully home without jamming. Because the positioning dimensions U and X are smaller than V and Y of the maximum gauge, this gauge exposes contact tubes that are too close together, too deep, or guidance holes that are off position.

Construction

  • Stainless steel body, hardened and ground, HRC 58 min.
  • Pins to the 15 A row of Table 21: earth ØC 8.74 mm, current-carrying ØD 7.09 mm
  • Positioning dimensions U 17.53 / X 18.16 mm, O = (X + C)/2 = 13.45 mm
  • Body stamp: BS 546:2025 表21和图19 plus serial number
  • Measured dimension data and calibration certificate supplied with the goods

Technical parameters

Model SC-B5F19-15A
Standard BS 546:2025 Table 21 and Figure 19
Rating / poles 15 A / 3-pin (2P+E)
U 17.53 mm (+0.00 / -0.01)
X 18.16 mm (+0.00 / -0.01)
C (earth pin Ø) 8.74 mm (+0.00 / -0.01)
D (current-carrying pin Ø) 7.09 mm (+0.00 / -0.01)
E (pin length) 21.67 mm (+0.00 / -0.01)
F 29.62 mm (+0.00 / -0.01)
O = (X+C)/2 13.45 mm (+0.00 / -0.01)
S 2.36 mm (+0.25 / -0.00)
T 1.98 mm (+0.25 / -0.00)
Material Stainless steel, hardened and ground, HRC 58 min.
Body stamp BS 546:2025 表21和图19 + serial number

BS 546:2025 Table 21 – dimensions of the minimum GO gauge (15 A row highlighted)

Rating A U (mm) X (mm) C (mm) D (mm) E (mm) F (mm) O = (X+C)/2 (mm) S (mm) T (mm)
2 8.04 10.74 5.11 3.58 13.74 16.92 7.93 1.57 1.17
5 13.83 13.79 7.09 5.11 16.92 21.67 10.44 1.98 1.57
15 17.53 18.16 8.74 7.09 21.67 29.62 13.45 2.36 1.98
30 26.34 28.40 9.55 7.95 29.62 37.54 18.97 2.77 2.36
Tolerance +0.00/-0.01 +0.00/-0.01 +0.00/-0.01 +0.00/-0.01 +0.00/-0.01 +0.00/-0.01 +0.00/-0.01 +0.25/-0.00 +0.25/-0.00

NOTE The radiated ends of the plug pin portions of the gauge shall be part of a sphere.

Product pictures

BS 546:2025 Table 21 / Figure 19 Minimum GO Gauge for Socket-outlet 15A SC-B5F19-15A
SC-B5F19-15A product picture (1/4)
BS 546:2025 Table 21 / Figure 19 Minimum GO Gauge for Socket-outlet 15A SC-B5F19-15A
SC-B5F19-15A product picture (2/4)
BS 546:2025 Table 21 / Figure 19 Minimum GO Gauge for Socket-outlet 15A SC-B5F19-15A
SC-B5F19-15A product picture (3/4)
BS 546:2025 Table 21 / Figure 19 Minimum GO Gauge for Socket-outlet 15A SC-B5F19-15A
SC-B5F19-15A product picture (4/4)

Standard drawing

BS 546:2025 Table 21 and Figure 19 - Minimum GO gauge for socket-outlet, 15 A
BS 546:2025 Table 21 and Figure 19 – Minimum GO gauge for socket-outlet, 15 A

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