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My interpretation of the text below is that conductive is the safest option for electronics and explosives, while ESD provides some protection for the wearer from being shocked by high voltage equipment, but because of this, it allows the wearer build up a higher charge then the conductive style (due to the difference in resistivity).
from ASTM F2413...
5.4 Conductive Protective Footwear:
5.4.1 Conductive footwear shall also meet the requirements
of 5.1 for impact resistant footwear and 5.2 for compression
resistant footwear.
5.4.2 Footwear shall be designed, constructed, and manufactured
to provide protection for the wearer against hazards
that may result from static electricity buildup and to reduce the
possibility of ignition of explosives or volatile chemicals.
5.4.2.1 Footwear shall dissipate static electricity from the
body to reduce the possibility of ignition of volatile compounds.
5.4.2.2 Footwear shall be of a construction that facilitates a
stable electrically conductive path. All external components
shall be made of nonferrous materials.
5.4.2.3 Conductive footwear is not designed to be worn by
personnel working near open electrical circuits.
5.4.3 The workmanship in the production and assembly of
the footwear shall ensure that the footwear provides functionality
to the wearer.
5.4.3.1 The uppers shall be made of materials that facilitate
the dissipation of static electricity.
5.4.3.2 The insoles, linings, outsoles, and heels of the
footwear shall be made of any combination of materials and
compounds which will facilitate electrical conductivity and the
transfer of static electricity build up from the body to the
ground.
5.4.3.3 The recommended design of the outsole and heel is
a single unit. Where the outsole and heel are separate components,
the following practices shall be used.
(1) Heel shall be attached to outsole to ensure no disruption
in electrical conductivity.
(2) Non-ferrous heel nails shall be used to attach the heels
when heel nails are used. These nails shall be recessed within
the tread surface and then covered with conductive material.
These nails shall not be either exposed or visible.
5.4.4 Electrical resistance shall be determined by evaluating
the minimum number of specimens per lot size in accordance
with Test Methods F 2412.
5.4.4.1 The specimens shall demonstrate resistance between
0 to 500 000 ohms.
5.4.4.2 Any specimen or sample of conductive footwear that
does not meet the performance requirement constitutes a
failure for the lot.
5.6 Static Dissipative (SD) Footwear:
5.6.1 Static dissipative footwear shall also meet the requirements
of 5.1 for impact resistant footwear and 5.2 for compression
resistant footwear.
5.6.2 Static dissipative footwear shall be designed, constructed,
and manufactured to provide protection to the wearer
against hazards which may exist due to excessively low
footwear resistance in a work environment, as well as maintain
a sufficiently high level of resistance to reduce the possibility
of electrical shock in work areas where SD footwear is worn.
5.6.2.1 Footwear shall reduce the excess static electricity by
conducting the charge (from body) to ground while simultaneously
maintaining a sufficiently high level of resistance (106
ohms) (1 megohm) to protect the wearer when exposed to
hazards from incidental contact with live electric circuits.
5.6.2.2 Using human subjects, a pair of footwear shall have
a lower limit of electrical resistance of 106 ohms (1 megohm)
and have an upper limit electrical resistance of 108 ohms (100
megohms).
5.6.3 The workmanship in the production and assembly of
the footwear shall ensure that the footwear provides functionality
to the wearer.
5.6.3.1 The footwear shall use any combination of materials
that facilitate static dissipation by a consistent path of resistance.
5.6.3.2 The inconsistency of certain hygroscopic materials
can result in footwear not being able to consistently meet the
performance requirements of static dissipative footwear.
5.6.3.3 Heels shall be attached using non-ferrous heel nails.
These nails shall be recessed within the tread surface and then
covered with conductive material. These nails shall be neither
exposed nor visible.
5.6.4 Static dissipation shall be determined by evaluating
the minimum number of specimens per lot size in accordance
with Test Methods F 2412.
5.6.4.1 Any specimen that does not meet the performance
requirement constitutes a failure for the lot.
What else can I help you with?
What two factors determine whether or not a static charge will move from one position to another?
The two factors determining static charge movement are potential difference (voltage) between the positions and a conductive path to allow the charge to flow. Without a potential difference, charges will not move; and without a conductive path, charges cannot flow from one position to another.
Why Static dissipative materials will allow a charge to be drained to ground?
Static dissipative materials have electrical resistance within a specific range that allows them to slowly transfer static charges to ground. This prevents sudden discharges or sparks that could damage sensitive electronic components. The controlled dissipation of static charges helps to maintain a safe working environment in environments where electrostatic discharge is a concern.
What are Static dissipative materials?
Static dissipative materials are materials that are designed to control and reduce the buildup of static electricity. They have a surface resistance that falls within a specific range (10^6 to 10^9 ohms/square) and allow charges to move across their surface without generating a spark. These materials are commonly used in electronics manufacturing, explosive environments, and cleanroom environments to prevent damage to sensitive devices and equipment.
What is the relationship between static electricity and voltage?
Static electricity is a buildup of electric charge on an object, while voltage is the measure of electric potential difference between two points. The relationship between static electricity and voltage is that static electricity can create a voltage difference when there is a buildup of charge, leading to the potential for electrical discharge or sparks.
What is the difference between differential pressure and static pressure in a fluid system?
Differential pressure is the difference in pressure between two points in a fluid system, while static pressure is the pressure at a single point in the system.
Can you put any insoles in static dissipative shoes?
No. The electric current must be able to pass through, so if the insole is made of a material that is non-conductive it defeats the purpose.
What are the differences between conductive and nonconductive rubber?
When a material is identified as conductive it means that an electrical current can pass through that material. Some materials do not readily conduct electricity through the material, but will dissippate static electricity so that there is not a build up of charge on the material. Humidity and applied voltage can make a big difference on how effective the less conductive or the dissipative materials respond. Some other details about how fast a charge is released and so forth are also considerations when determining a materials response to electrical energy. In short, a conductive rubber has a Ohm resistance no larger that about 1,000,000 Ohms (often referred to as Ohms/square). Dissipative rubber has a resistance of about 1,000,000 to 1,000,000,000 Ohms. "Anti-Static" rubber is about 1,000,000,000 to 1,000,000,000,000 Ohms. Anything over this is considered insulative rubber. (refer to Boedeker.com for more detailed information).
WAP to show the difference between a variable and static variable?
difference between constant and static variables in java
What two factors determine whether or not a static charge will move from one position to another?
The two factors determining static charge movement are potential difference (voltage) between the positions and a conductive path to allow the charge to flow. Without a potential difference, charges will not move; and without a conductive path, charges cannot flow from one position to another.
What is the difference between static function and global static function?
'global static'?! There is no such thing.
What is the Difference between public static void and static public void?
There is no difference between public static void and static public void
Why Static dissipative materials will allow a charge to be drained to ground?
Static dissipative materials have electrical resistance within a specific range that allows them to slowly transfer static charges to ground. This prevents sudden discharges or sparks that could damage sensitive electronic components. The controlled dissipation of static charges helps to maintain a safe working environment in environments where electrostatic discharge is a concern.
What is the difference between static electricity and static discharge?
i love v a g i n a
What is the difference between static and dynamic fighting?
Static stays the same and dynamic is always different.
What are conductive boot covers?
Protective covers for shoes to be worn in sterile environments with a conductive strip to eliminate static electricity.
What is the difference between static and electricity?
Static is electricity. It's just not all neatly contained in a wire.
What is Difference between static and dynamic list?
A static one cannot change, while a dynamic one can.
