## Motor Repair

## Engineering

You subtract 32 degrees from the fahrenheit value. Then you divide by 9. Finally, you multiply by 5.

Example: If temperature is 68 degrees fahrenheit, subtracting 32 leaves 36. Dividing 36 by 9 equals 4. Finally, multiplying 4 by 5 equals 20. So the answer is 20 degrees centigrade.

## Engineering

First you divide the Centigrade (celsius) value by 5. Then, you multiply this new value by 9. Finally, you add 32 degrees to this latest value.

Example: If the Centrigrade value is 25 degrees, dividing by 5 leaves 5. Then, multiplying 5 by 9 equals 45. Finally adding 32 to 45 leaves 77 degrees Fahrenheit.

## Contracting

*NEC Committee Report on Proposals*, 2010 Annual Revision Cycle, Code-Making Panel 4 has voted to accept a Code change submitted by Joel A. Rencsok of Scottsdale, Ariz. (Log #307 NEC-P04). The recommendation calls for adding a new section to Art. 225, which states:

"Raceway Seal. Where a feeder raceway enters a building or structure from an underground distribution system, it shall be sealed in accordance with 300.5(G). Spare or unused raceways shall also be sealed. Sealants shall be identified for use with the cable insulation, shield or other components."

As noted in the substantiation summary, feeders entering buildings or other structures are no different than services. The requirements should be the same as noted in 230.8.

## Energy Conservation

You can save $130.00 per year in electricity and another $40.00 in maintenance savings by changing out (1) light bulb. Based on an initial cost of $3.00 (the cost of these bulbs here at Traver IDC), the payback is an unbelievable 7 DAYS!!! That's right, you will recoup the cost of the new light bulb in only 1 WEEK!!!

So, how do we calculate this.

**ENERGY SAVINGS:**

KW saved = (100 watts - 25 watts)/1000 = .075 kw

KWH saved = .075 kw x 24 hours x 365 days = 657 kwh

Total Energy Savings = 657 kwh x $.20/kwh = $131.40/year (apx $130.00/year)

**MAINTENANCE SAVINGS:**

Existing Lamp Life = 1000 hours

# of Lamps Required per year = 8760 hours/year / 1000 hours/lamp = 8 lamps

Material cost = 8 lamps x $1.00/lamp = $8.00

Labor Cost = 5 minutes/lamp x 8 lamps / 60 minutes/hour x $60.00/hour = $40.00

Total cost = $8.00 + $40.00 = $48.00

Proposed Lamp Life = 10,000 hours

# of Lamps Required per year = 8760 hours/year / 10,000 hours/lamp = 1 lamp

Material cost = 1 lamp x $3.00/lamp = $3.00

Labor Cost = 5 minutes/lamp x 1 lamps / 60 minutes/hour x $60.00/hour = $5.00

Total cost = $3.00 + $5.00 = $8.00

Total Maintenance Savings = $48.00 - $8.00 = $40.00/year

TOTAL SAVINGS = $170.00/YEAR

CLASS DISMISSED, NOW GET DOWN TO TRAVER IDC TODAY AND BUY A BOATLOAD OF 25 WATT CFLs!!!

## Supply

At 200 Volts: Size 00 - 1-1/2HP; Size 0 - 3HP; Size 1 - 7-1/2HP; Size 2 - 10HP; Size 3 - 25HP; Size 4 - 40HP; Size 5 - 75HP; Size 6 - 150HP.

At 230 Volts: Size 00 - 1-1/2HP; Size 0 - 3HP; Size 1 - 7-1/2HP; Size 2 - 15HP; Size 3 - 30HP; Size 4 - 50HP; Size 5 - 100HP; Size 6 -200HP.

At 460/575 Volts: Size 00 - 2HP; Size 0 - 5HP; Size 1 - 10HP; Size 2 - 25HP; Size 3 - 50HP; Size 4 - 100HP; Size 5 - 200HP; Size 6 - 400HP.

## Contracting

For 4-6 conductors - 80%.

For 7-9 conductors - 70%.

For 10-20 conductors - 50%.

For 21-30 conductors - 45%.

For 31-40 conductors - 40%.

For 41 & above - 35%.

## Motor Repair

A constant torque motor is a motor for which the rated horsepower varies in direct ratio the the synchronous speeds. The output torque is the same at all speeds.

## Motor Repair

## Engineering

## Engineering

## Engineering

## Motor Repair

## Motor Repair

## Engineering

Traver IDC

151-165 Homer St., Waterbury, CT 06704

t 203.753.5103 | f 203.573.9352

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