All of the MICON types of multi-outlet insulated connectors are manufactured with a fully molded insulation. The standard insulating material is Mypar, or compound type GA-20. Mypar is a special compounded rubber base insulation designed to resist the deteriorating effects of oils, sulphurous and organic gases as well as seepage water containing the types of contaminates found in sewer systems. Mypar has been chosen as the general insulation for the MICON connectors be cause of the following beneficial qualities:

1.    High dielectric strength

2.    High mechanical strength

3.    High resistance to abrasion

4.    Good resistance to action of alkalis

5.    Good resistance to moderately concentrated solutions of common acids.

6.    Relatively high resistance to deteriorating effects
    of oil. Will withstand occasional immersion in oil
    without any deleterious effects.
7.   Long age of life under normal operating temperatures
    found in underground systems. Like any rubber bearing
    compound the life expectancy of Mypar is reduced at
    elevated temperatures. Mypar can be raised to approx-
    imately 950C before deterioration will occur at an
    accelerated rate. Mypar maintains a relatively stable
    Durometer hardness throughout its normal temperature
    operating range. At extremely low temperatures
    (approximately 0°C) Mypar will become more rigid but
    will maintain an adequate degree of flexibility.

There are applications where MICON connectors are subject to frequent immersion in waters containing relatively large amounts of oil or higher concentrations of acids, alkalis, and hydro-carbons. For these applications Myprene, or compound GA-62 is recommended as the insulating material. Myprene is a neoprene base compound with extremely high resistance to oil or acid contaminated water. In addition can be used at temperatures up to 145°C for periods of short duration
without any measurable deterioration.

The specifications and minimum physical properties of both compounds are presented in tables A and B.

ELECTRICAL CONNECTORS

MYPAR (Compound GA-20) is the standard rubber insulating compound used on all of the MICON connectors, accessories and special modifications.

(1.)    Rubber Content ------------- 60% by weight
(2.) Specific Gravity ----------- 1,16
(3.) Durometer Hardness --------- 55
(4.)    Water absorption after immersion in water at 70OF for 24 hours --------------- 0.23%
(5.)    Tensile Strength ----------- 3000 lbs. per sq. in.
(6.)    Elongation at Rupture ------ 550%
(7.)    Modification of Properties after immersion in ASTM
    oil #1 for 48 hour period at 70OF
    Tensile Strength ----------- 1.3% Loss
    Elongation at Rupture ------ Zero
    Volume Swelling ------------ 5% Gain
    Durometer Hardness --------- Minus 1

(8.)    Modification of Properties after 96 hour oxygen  bomb test at 1580F
    Tensile Strength ----------- 14.4% Loss
    Elongation at Rupture ------ 17.9% Loss
    Durometer ------------------ Plus 3

(9.) Electrical Characteristics of Insulation as molded on connector (a.) Effect of rising voltage breakdown test showed 2000 ampere capacity type MC MICON to run between 35 and 40 KV. Test run dry with MICON covered with powdered zinc. (b.) Effect of rising voltage breakdown test with same size connector immersed in a 3% Saline solution at 70OF average temperature showed MICON breakdown voltages to run 15 - 18 KV after 30 weeks.

MYPRENE (Compound GA-62) is the neoprene insulating compound used when specified in place of MYPAR for more severe applications on MICON connectors, accessories and special modifications.

(1.)    Rubber Content ------------- None
(2.)    Naoprene Content ----------- 52% neoprene by weight
(3.)    Specific Gravity ----------- 1.35
(4.)    Durometer Hardness --------- 60
(5.)    Water absorption after immersion in water at 70°F for 24 hours -------------- 1.12%
(6.)    Tensile Strength ----------- 2500 lbs. per sq. in.
(7.)    Elongation at Rupture ------ 400%
(8.)    Modification of Properties after immersion in ASTM oil #1 for 48 hour period at 70°F
    Tensile Strength ----------- 19% Gain
    Elongation at Rupture ------ 7% Gain
    Durometer Hardness --------- Minus 1
    Volume Swelling ------------ 1.8% Gain

(9.)    Modification of Properties after 96 hour oxygen bomb test at 158°F
    Tensile Strength ----------- 11.9% Loss
    Elongation at Rupture ------ 14% Loss
    Durometer Hardness --------- Plus 8

(10.) Electrical Characteristics of insulation as molded on connector (a.) Effect of rising voltage breakdown test showed 2000 ampere capacity type MC MICON to run between 20 and 25 KV. Test run dry with MICON covered with powdered zinc. (b.) Effect of rising voltage breakdown test with same size connector immersed in a 3% Saline solution at 70°F average temperature showed MICON breakdown voltages to run between 12 and 17 KV.