What is a Class 2 Div 1?

Class II Division 1 malocclusions exhibit increased overjet, and proclined upper incisors. The vertical relationship of the incisors can vary between open bite to deep overbite. Class II Division 2 malocclusions have retroclined upper central incisors. They often present with an increased overbite and minimal overjet.

Does Class 2 Div 1 require explosion proof?

A Class I Division 2 light are not held to as high of a standard as Division 1 products. To meet the requirements for Division 2, a light does not have to be able to contain an explosion. Instead, they must be found to be unable to cause an explosion in environments for which they are approved to be used.

What is a Class 2 Division 1 hazardous location?

Class Definition The Classes define the type of explosive or ignitable substances which are present in the atmosphere such as: Class I locations are those in which flammable vapors and gases may be present. Class II locations are those in which combustible dust may be found.

What is the difference between Zone 1 and Zone 2?

Zone 1: An area in which an explosive gas atmosphere is likely to occur in normal operation; Zone 2: An area in which an explosive gas atmosphere is not likely to occur in normal operation and, if it occurs, will only exist for a short time.

What is a Class 2 Div 1 occlusion?

1 INTRODUCTION The patients with Class II division 1 malocclusion often have problems in both dental tissue and facial soft tissues, typically the protrusion of upper incisors and lip, which could have impact on facial esthetics.

What is the difference between Class 2 Division 1 and 2?

The class II division 2 differs from division 1 by the following characteristic: the discrepancy between the upper and lower teeth does not match the discrepancy between the upper and lower teeth where the molars and canines are located (red and blue arrows).

What type of wiring must be used in a Class 1 Division 1 hazardous location?

Two of the allowable wiring methods for a Class I Division 1 location are threaded rigid metal conduit (RMC) and threaded steel intermediate metal conduit (IMC).

What are bathroom Zones electrical?

Bathroom electrical zones are areas of your bathroom where electrical products are installed and pose a risk of an electric shock, if they’re not installed properly, due to the proximity of the appliance and water. Bathroom zones are broken down into Zone 0, 1 and 2.