DSH 309 Overcurrent Protection, Note

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DSH 309 ( `) W! S' v. h" T0 `

Overcurrent Protection, Note

9.6

61010-1(ed.1);am1;am2 2 ?! q5 i0 u  c3 E% a1 r) n

' i0 h7 ]  G1 C: S$ a+ `Standard:
IEC 61010
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9.6
Sheet n. 309
- w7 `9 L% C7 b. SPage 1(1)
Subject:
Overcurrent Protection, Note
Key words:
- Mains
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Provisional decision taken by ETF3 and confirmed by CTL at its 38th meeting, in Toronto
Question:
. n! D1 {; b5 m# N. EThe note recommends that both supply conductors are fused. How is this recommendation applied?
Decision:
# L( J* @2 `4 s6 z  _The standard allows the use of a single fuse and therefore, under CB rules this is accepted.
Explanation:
0 N4 {+ e8 x2 A2 g. jWhere a supply is not polarised then equipment employing earthing for protection should be provided with a fuse in both mains conductors.
$ _+ r& Y( W& ?0 H" oEvaluators are requested to draw the attention of submittors to this situation and make an informative note in the report as appropriate.
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