关于家电塑胶壳的灼热丝测试

请教家电塑胶壳做过下列检测的朋友,一同讨论下:
IEC/EN 60335-1, §30 Resistance to heat and fire and §29

-Glow wire test @750° and 850°

-PTI@250° min.

我司客户要求做以上检测,4月份我进行一次检测,检测公司为XXX,
750度报告上测试方法是:IEC60695-2-11
850度报告上测试方法是:IEC60695-2-12,结果都为合格;
上星期又对另款型号产品进行以上相同的检测,检测公司为XXX,
750度与850度报告上测试方法都是:IEC60695-2-11,结果750度合格,850度不合格;
我司就不明白,两次测试方法不相同,检测公司说是检测标准的版本的升级,并附以下说明:
30.2.2 For appliances that are operated while attended, parts of non-metallic material supporting current-carrying connections, and parts of non-metallic material within a distance of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11. However, the glow-wire test is not carried out on parts of material classified as having a glow-wire flammability index according to IEC 60695-2-12 of at least
– 750 °C, for connections which carry a current exceeding 0,5 A during normal operation,
– 650 °C, for other connections.
If the glow-wire flammability index is not available for a sample with a thickness within ± 0,1 mm of the relevant part, then the test sample shall have a thickness equal to the nearest preferred value specified in IEC 60695-2-12 that is no thicker than the relevant part.
NOTE 1 The preferred values in IEC 60695-2-12 are 0,75 mm ± 0,1 mm, 1,5 mm ± 0,1 mm and 3,0 mm ± 0,2 mm.
Where a non-metallic material is within 3 mm of a current carrying connection, but is shielded from the connection by a different material, the glow-wire test of IEC 60695-2-11 is carried out at the relevant temperature with the tip of the glow-wire applied to the interposed shielding material with the shielded material in place and not directly to the shielded material.
When the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are
– 750 °C, for connections that carry a current exceeding 0,5 A during normal operation,

这是IEC60335-1,2008最新标准里条款30.2.2 的原文，标准说用IEC60695-2-11，而不用IEC60695-2-12来测750 °C

30.2.3.1 Parts of non-metallic material supporting connections that carry a current
exceeding 0,2 A during normal operation, and parts of non-metallic material within a
distance of 3 mm of such connections, are subjected to the glow-wire test of IEC 60695-2-11
with a test severity of 850 °C. However, the glow-wire test is not carried out on parts of
material classified as having a glow-wire flammability index of at least 850 °C according to
IEC 60695-2-12.

这是IEC60335-1,2008最新标准里条款30.2.3.1 的原文，标准说用IEC60695-2-11，而不用IEC60695-2-12来测８50 °C

请教各位:
检测公司这样解释符合吗?对吗?