ASAP please

Name:

Student No$.$:

Section:

For the motor nameplates below, choose A$,$B$,$ or C to specify the OCPD required.

A$=5"$ on $"$

TYPE

prage

orete

Determine the size of the OCPD for each motor using the motor nameplates provided and based on the

NEC Table $430\mathrm{.}52.$ Select a standard size fuse or circuit breaker for the application. Select the next

larger size of standard fuse or breaker. Place your answers in the table provided.

a$.$ NTDF

FULL$-$VOLTAGE START

d$.$ ITCB

b$.$ ITB

RESISTOR START

c$.$ TDF

FULL$-$VOLTAGE StaRT

e$.$ TDF

RESISTOR START

Using the motor nameplates, determine the current rating of the overload heater and the heater

number for each motor. Select the next smallest standard size heater from the Heater Selections tables

provided. Place your answers in the table provided.

a$.$

FULL$-$VOLTAGE START

b$.$

RESISTOR START

c$.$

RESISTOR START

For the motor below, using a time$-$delay fuse, calculate the OCPD size then select the OCPD. Also

calculate the overload heater current rating and select the heater number if a size $3$ starter is used.

Notes for Table $430\mathrm{.}52$:

Nontime Delay Fuse $=$ NTDF

Time$-$Delay Fuse $=$ TDF

Instantaneous Trip Breaker $=$ ITCB

Inverse Time Breaker $=$ ITB

Notes for sizing of the running overload protection device $($overload heaters$)$:

The NEC describes the sizing of the running overload protection device using motor nameplate data. The

percentage above FLC depends on two factors per the NEC:

Motors with a marked service factor not less than $1\mathrm{.}15=125\%.$ In other words, if SF $>=1\mathrm{.}15,$

multiply FLC by $1\mathrm{.}25(125\%)$

Motors with a marked temperature rise not over $40^($@$)$C$=125\%.$ In other words, if temp. rise @$)$C$,$

multiply FLC by $1\mathrm{.}25(125\%)$

Motors not meeting these special conditions $=115\%.$ In other words, if SF $<mtext></mtext><mn>1</mn><mn>.</mn><mn>1</mn><mn>5</mn>$ or temp. rise $>40^($@$)$C$,$

multiply FLC by $1\mathrm{.}15(115\%)$

Table $430\mathrm{.}52$ Maximum Rating or Setting of Motor Branch$-$Circuit Short$-$Circuit and Ground$-$Fault Protective Devices

Note: For cerzain exceptions to the values specified, see $430\mathrm{.}54.$

The values in the Nontime Delay fuse column apply to time$-$delay Class CC fuses.

The values given in the last column also cover the ratings of nonadjustable inverse time types of circuit be teakers that may be modfied as in

$43052(0(1).$ Exceptions No$.1$ and No$.2$

isymchronous mo:ors of the low$-$torque. low$-$speed type $($usualy $450$ rom or lower$).$ such as are used to drive reciprocating compressars. purios.

and so forth, that start unloaded, do not require a fuse rating or cricuit$-$breaker setsing in excess of $200$ percent: of fuil$-1\mathrm{.}0$ad current: