Answer:
They must be enclosed in explosion proof housing or general-purpose housing (as per NEC Regulations)
Explanation:
It is important to know what are Class I, Division 1 and 2 locations.
Class I: includes those industries or places where flammable gases exists and there are chances of explosions.
Division 1: Those places where hazard can happen under normal operating conditions
Division 2: Those places where hazard can happen under abnormal conditions.
The conventional relays, contactors and switches cause arcing when they operate and this is a completely normal phenomenon but with respect to these categories, it is very dangerous to operate such electrical devices without any precaution.
Therefore industries are required by the regulatory authorities to install explosion proof housing to enclose conventional relays, contactors and switches to avoid any explosion or hazard. General-purpose housing can also be used given that it follows the regulations provided by the NEC or any other regulatory authority.
There is no lines that we can see. Also the rate of something has the biggest number or its either gonna be the longest line, yw .
Answer:
sphere #1 carries positive charge and #2 carries negative charge
This is because from the laws of static electricity, disconnecting the copper wire makes #1 to be positively charged and #2 to be negatively charged
Answer:1080 N/m
Explanation:
Given
Spring constant of first Spring 
mass of both the system is same
Both system have same maximum velocity
if 
is general equation of SHM
then maximum velocity is given by
similarly 
also 
so 
