Rule 3387.
(1)
Rubber insulating blankets, rubber insulating matting, rubber insulating
covers, rubber insulating line hose, rubber insulating gloves, and rubber
insulating sleeves shall meet the following requirements:
(a) Blankets, gloves, and sleeves shall be
produced by a seamless process.
(b)
Each item shall be clearly marked as follows:
(i) Class 00 equipment shall be marked class
00.
(ii) Class 0 equipment shall be
marked class 0.
(iii) Class 1
equipment shall be marked class 1.
(iv) Class 2 equipment shall be marked class
2.
(v) Class 3 equipment shall be
marked class 3.
(vi) Class 4
equipment shall be marked class 4.
(vii) Non-ozone-resistant equipment shall be
marked type I.
(viii)
Ozone-resistant equipment shall be marked type II.
(ix) Other relevant markings, such as the
manufacturers identification and the size of the equipment, may also be
provided.
(c) Markings
shall be non-conducting and shall be applied in such a manner as not to impair
the insulating qualities of the equipment.
(d) Markings on gloves shall be confined to
the cuff portion of the glove.
(2) Electrical requirements shall be all of
the following:
(a) Equipment shall be capable
of withstanding the alternating current proof-test voltage specified in Table A
or the direct current proof-test voltage specified in Table B. All of the
following apply:
(i) The proof test shall
reliably indicate that the equipment can withstand the voltage
involved.
(ii) The test voltage
shall be applied continuously for 3 minutes for equipment other than matting
and shall be applied continuously for 1 minute for matting.
(iii) Gloves shall be capable of separately
withstanding the alternating current proof-test voltage specified in Table A
after a 16-hour water soak.
(b) When the alternating current proof test
is used on gloves, the 60-hertz proof-test current shall not exceed the values
specified in Table A at any time during the test period. All of the following
apply:
(i) If the alternating current proof
test is made at a frequency other than 60 hertz, the permissible proof-test
current shall be computed from the direct ratio of the frequencies.
(ii) For the test, gloves(right side out)
shall be filled with tap water and immersed in water to a depth that is in
accordance with Table C. Water shall be added to or removed from the glove, as
necessary, so that the water level is the same inside and outside the
glove.
(iii) After the 16-hour
water soak specified in this subrule, the 60-hertz proof-test current shall not
exceed the values given in Table A by more than 2 milliamperes.
(c) Equipment that has been
subjected to a minimum breakdown voltage test shall not be used for electrical
protection. See subrule (3) of this rule.
(d) Material used for Type II insulating
equipment shall be capable of withstanding an ozone test, with no visible
effects. The ozone test shall reliably indicate that the material will resist
ozone exposure in actual use. Any visible signs of ozone deterioration of the
material, such as checking, cracking, breaks, or pitting, is evidence of
failure to meet the requirements for ozone-resistant material. See subrule (3)
of this rule.
(3)
Workmanship and finish shall comply with both of the following:
(a) Equipment shall be free of physical
irregularities that can adversely affect the insulating properties of the
equipment and that can be detected by the tests or inspections required by
these rules.
(b) Surface
irregularities that may be present on all rubber goods, because of
imperfections on forms or molds or because of inherent difficulties in the
manufacturing process, and that may appear as indentations, protuberances, or
imbedded foreign material are acceptable under the following conditions:
(i) The indentation or protuberance blends
into a smooth slope when the material is stretched.
(ii) Foreign material remains in place when
the insulating material is folded and stretches with the insulating material
surrounding it.
(4) Rubber insulating equipment meeting the
national consensus standards in Table 4 is considered to be in compliance with
the performance requirements of these rules.
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TABLE 2
AMERICAN SOCIETY OF TESTING MATERIALS
STANDARDS
|
|
STANDARD TITLE
|
ASTM NUMBER
|
EDITION
|
SUPPLEME NT
|
|
Standard Specification for Rubber Insulating
Gloves
|
D-120
|
2009
|
-
|
|
Standard Specification for Rubber Insulating
Matting
|
D-178
|
2001
|
2010
|
|
Standard Specification for Rubber Insulating
Blankets
|
D-1048
|
2012
|
-
|
|
Standard Specification for Rubber Insulating
Covers
|
D-1049
|
1998
|
2010
|
|
Standard Specification for Rubber Insulating
Line Hose
|
D-1050
|
2005
|
2011
|
|
Standard Specification for Rubber Insulating
Sleeves
|
D-1051
|
2008
|
-
|
|
These standards contain specifications for
conducting the various tests required in these rules. For example, the
alternating current and direct current proof tests, the breakdown test, the
water-soak procedure, and the ozone test described in this rule are described
in detail in these ASTM standards.
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ASTM F-1236 "Standard Guide for Visual
Inspection of Electrical Protective Rubber Products," 1996 Edition with 2012
supplement, as adopted in
R
408.13301a, presents methods and techniques for the
visual inspection of electrical protective equipment made of rubber. This guide
also contains descriptions and photographs of irregularities that can be found
in this equipment
|
|
ASTM F-819 "Standard Terminology Relating to
Electrical Protective Equipment for Workers," 2010 edition, as adopted in
R
408.13301a, includes definitions of terms relating to
the electrical protective equipment covered in these rules.
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Notes
Mich. Admin. Code
R. 408.13387
1983
AACS; 1995 AACS; 1997 AACS; 2014 AACS; 2015 AACS; 2016 AACS; 2018
MR
3, Eff. 2/8/2018
