UL 60730-2-16A standard pdf

11.2.3 Bolts in joint width

11.2.3.1 (I) A bolt may be located in the joint width provided that the requirements in Table 3, Table 5, and Table 6 (informative) as applicable, and the minimum effective joint width specified in Table 4 are met. See Figure 4.

11.2.3.2 (I) For a supplementary enclosure, such as a terminal box, device cover, and the like, or other part attached to the motor enclosure, a bolt may be located in the joint width if the joint construction complies with the requirements in 11.2.3.1. See Figure 4.

11.2.3.3 (I) The depth of tapping for the bolt mentioned in 11.2.3.1 and 11.2.3.2 shall permit nominal variations in standard bolt lengths to be accommodated. The use of washers shall be optional, but if used, the bolts shall be capable of securing the part tightly without the washers.

11.3 Group B locations

11.3.1 General

11.3.1.1 (I) The width of a joint in an enclosure having a free internal volume of not more than 0.5 dm3 (30 cubic inches) shall not be less than 9.5 mm (3/8 inch). At a bolt hole, the width shall be measured from the inside edge to the nearest edge of the bolt clearance hole. The cover thickness at the joint flange shall not be less than 9.5 mm (3/8 inch). The clearance between the joint surfaces shall be less than 0.038 mm (0.0015 inch) or such that a 0.038 mm (0.0015 inch) feeler gauge will not enter the joint more than

3.2 mm (1/8 inch) at any point. See Figure 8.

11.3.1.2 (I) For an enclosure having a free internal volume of not more than 0.1 dm3 (6 cubic inches), the clearance between the joint surfaces may be more than 0.10 mm (0.004 inch), and the cover thickness at the joint flange may be less than 3.2 mm (3/8 inch).

11.3.1.3 (I) The width of a joint in an enclosure having a free internal volume of more than 0.5 dm3 (30 cubic inches) and not more than 1.6 dm3 (100 cubic inches) shall not be less than 15.9 mm (5/8 inch). At a bolt hole, the width shall be measured from the inside edge to the nearest edge of the bolt clearance hole. The clearance between the joint surfaces shall be less than 0.038 mm (0.0015 inch) or such that a

0.038 mm (0.0015 inch) feeler gauge will not enter the joint more than 3.2 mm (1/8 inch) at any point. A rabbet joint shall have a total width of not less than 22.2 mm (7/8 inch), with neither section of joint being less than 9.5 mm (3/8 inch) wide. The diametrical clearance at the axial section of joint shall not be more than 0.064 mm (0.0025 inch), and the clearance at the radial or clamped section of joint shall not be more than 0.038 mm (0.0015 inch).

11.3.1.4 (I) The width of a joint in an enclosure having a free internal volume of more than 1.64 dm3 (100 cubic inches) and not more than 5.7 dm3 (350 cubic inches) shall not be less than 25.4 mm (1 inch). At a bolt hole, the width shall be measured from the inside edge to the nearest edge of the bolt clearance hole. The clearance between the joint surfaces shall not be more than 0.038 mm (0.0015 inch).

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UL 405

SEPTEMBER 7, 2012

40.1.4 The output of the CCID shall be resistively loaded to the rated current of the device in series with S2. The value of RB2 shall be adjusted to draw 90 percent of the trip threshold value measured in 40.1.2. Starting with S1 – S3 open, the attachment plug of the CCID20 under test shall be inserted in one of the receptacles of the GFCI. Switch S1 shall be closed, and 10 seconds allowed for the devices to stabilize. At the end of 10 seconds, S3 shall be closed. The Class A GFCI shall trip when S3 is closed. The trip time shall comply with the individual trip time requirements in the section titled High-Resistance Ground Fault in Annex A, Ref. No. 26, indicating that the leakage cancellation does not impair the GFCI. The test shall be repeated starting with S2 closed. Both tests shall be repeated with reversed polarity.

40.1.5 The test described in 40.1.3 – 40.1.4 shall be repeated with RB1 adjusted to 500 ohms.

41 Dust Test

41.1 To determine compliance with footnote b in Table 1, six samples, each mounted in a different mounting orientation, shall be placed, deenergized, in an air-tight chamber having an internal volume of at least 0.09 m3 (3 cubic feet).

41.2 A 0.06 kg (2 oz) quantity of cement dust, maintained at a relative humidity of 20 – 50 percent and capable of passing through a 200 mesh screen, shall be circulated for 15 minutes by means of compressed air or a blower so as to completely envelop the sample in the chamber. The air flow shall be maintained at an air velocity of approximately 0.25 m/s (50 fpm).

41.3 Following the exposure to dust, the sample exterior shall be carefully cleaned. The sample shall then be opened and examined for the presence of dust. If there is no evidence of dust within the interior, the sample can be considered ”closed-in” for spacing purposes. See Table 1.

41.4 As an alternative to the dust test procedure (cement dust) in 41.1 – 41.3, a sample may be subjected to the dust test (talcum) for first characteristic numeral 5 as specified in Annex A, Ref. No. 27.

RATINGS

42 General

42.1 A device shall be rated according to voltage of the anticipated supply or supplies with which use is intended, current, frequency or DC, and level of charging system, or, identification of the specific intended supply.

42.2 A charging circuit interrupting device shall be rated according to ground-fault trip threshold.

42.3 A charging circuit interrupting device that includes pressure wire connectors that are intended to be field-wired shall have a torque value assigned to each pressure wire connector.

42.4 A device may be rated according to short circuit withstand current.

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NMX-J-668/2-ANCE [2666] CSA C22.2 NO. 281.2–12 [2666] UL 2231-2 65

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