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Ins
t
al
la
tion,
Opera
tion and
M
ai
nt
en
an
c
e
M
an
u
al
4
IO
-
70103
Re
v 0, 1/2013
Su
r
ge Pr
otectiv
e D
e
vi
ces
EL
EC
TRI
C
AL
C
ONN
ECTI
ONS
All
e
le
ctr
ical
c
onne
c
tions should be ins
t
alled
b
y a q
u
alified
(li
cens
ed)
e
le
ctrici
an onl
y
.
All wi
r
ing
mu
st
c
omply with the
Na
tio
n
al Ele
ctr
ical
C
ode (N
E
C)
and applicable local
c
od
e
s.
VER
IF
Y TH
A
T ALL P
O
WER C
IRCU
ITS ARE
DE-
ENE
RGI
ZED AND
L
OCKED OUT BE
F
ORE MAK
I
NG
EL
EC
TRI
C
AL
C
ONN
EC
TION
S.
V
ol
t
age
R
atings and
Pow
er Sour
c
e
C
onfigu
r
ations
Bef
ore
m
aking
c
onne
c
tions
t
o the unit,
verif
y t
ha
t the unit
mod
e
l numb
er
and
n
am
ep
la
t
e
v
ol
t
age r
a
ting are
approp
r
ia
t
e
f
or
c
onne
c
tion
t
o the i
nte
nded p
ow
e
r
s
our
ce
.
See the
char
t on
p
age
3 f
or
v
ol
t
age r
a
ting applic
a
tions
with
typ
ical p
ow
e
r
s
our
c
e
c
onfigur
a
tions.
Wire
C
on
nec
tions
With
p
arall
e
l
c
onne
c
tion, the s
iz
e
o
f
the wi
r
ing
to
the
S
PD
unit
is
ind
epe
nd
ent of
the
pr
otect
ed
c
ir
cuit s ampacity
. N
E
C A
r
ti
c
le 285
-
21(B) requir
e
s su
r
ge
suppr
ess
or
c
onne
c
ting
c
ondu
ctor
s
t
o be
a
t l
ea
st #14
c
opp
e
r
or #12 aluminum.
To
redu
ce
the
wi
r
ing
impe
d
an
ce
to
su
r
ge
curren
ts, it
is
re
c
omm
e
nded t
hat
the p
ha
se
,
ne
utral (
i
f required), and
ground
c
ondu
ctors
are
t
wis
t
ed
t
og
e
th
er
and
rou
t
ed
in the same ra
c
ew
a
y (
c
onduit).
Avoi
d
an
y s
har
p b
e
nds in the
c
ondu
ctor
s.
Ov
er
c
urrent Pr
ot
ec
tion
The
S
PD unit
c
ondu
c
ts
pra
c
tically no
curren
t und
e
r no
rm
al op
era
tion
and only
c
ondu
c
ts
ver
y sho
r
t dur
a
tion transi
en
t su
r
ge
curren
ts.
NEC C
onside
r
ations
-
The
f
oll
o
wing is from the
Na
tio
n
al
Ele
ctr
ic
C
ode 2008
E
dition.
NE
C
285.21
C
on
nec
tions
NEC
285.23
T
ype
1 SPD s. Sh
all
be
ins
t
alled
in
ac
co
rd
an
ce
with
285.35(A) and (B).
(A)
Ins
t
allatio
n
.
T
ype 1
S
PD
s s
h
all be ins
t
alled
a
s
f
oll
ows:
(1)
Type 1 S
PD
s sh
all
be
per
mit
t
ed
to
be
c
onne
ct
ed
t
o
t
he
supply
si
de
of
the
ser
vi
ce
di
sc
onne
ct as
per
mit
t
ed
in
230.82(4) or
(2)
T
ype
1 S
PD
s sh
all
be
per
mit
t
ed
to
be
c
onne
ct
ed
in
T
ype 2 loc
a
tion
s
a
s
s
pe
c
ified
in 285.24.
(B)
A
t t
h
e se
r
vi
ce
.
Wh
e
n ins
t
alled
a
t the
ser
vi
ce
s, the
grounding
c
ondu
ct
or
o
f a
T
ype 1
S
PD s
h
all be
c
onne
ct
ed
t
o one
o
f the
f
oll
o
win
g:
(1) Grounded
ser
vi
c
e
c
ondu
ct
or
(2) Grounded
e
le
c
trode
c
ondu
ct
or
(3) Grounding
e
le
c
trode
f
or
ser
vi
ce
(4)
E
quipm
ent
grounding
ter
mi
n
al
in
the
ser
vi
ce
equipm
ent
V
ol
t
age Pr
ot
ec
tion
R
atings
T
o o
bt
ain the
v
ol
t
age
pr
otec
tion r
a
tin
g
s (VPR
s),
a
s o
bt
ained
b
y Und
erwriter
s
L
abor
at
ory
, In
cor
por
ated
, in ac
co
rd
an
c
e with the
St
a
nd
ar
d
fo
r
Saf
ety
, Sur
g
e Pr
otec
ti
v
e Dev
ice
s (
SPD
s),
St
a
nd
ar
d 1449,
T
hi
r
d
Ed
it
ion
, r
e
le
as
ed (2009)
,
mark
ed on this produ
c
t, the
wire s
iz
e lis
t
ed
f
or
eac
h produ
c
t
mu
st be util
iz
ed
t
o
c
onne
c
t
the unit
t
o
y
our
fac
iliti
es
p
ow
er gr
id
. C
onne
c
tions
m
ade
with
c
ondu
ctor
s
o
th
e
r t
h
an the wire
siz
e lis
t
ed
ma
y r
e
sult in
dif
fe
ren
t VPR
s.
Cir
c
uit
Ampacit
y
Limi
t
ations
Re
pr
es
enta
ti
v
e
sampl
e
s
o
f
th
es
e produ
c
ts
hav
e be
e
n i
nv
e
st
i
ga
t
ed
b
y Und
erwriter
s
L
abor
at
orie
s, In
cor
por
at
ed
t
o withs
t
an
d
, without
e
xp
o
sing
li
v
e
c
ir
c
uits or
c
ompon
en
ts
a
t
s
ys
te
m
v
ol
t
ag
e
s and
f
ault
curren
ts up
t
o 200,000 AIC,
a
s d
es
cr
ibed in the
St
a
nd
ar
d f
o
r
Saf
ety
, Sur
g
e Pr
otec
ti
v
e Dev
ice
s (
SPD
s),
St
a
nd
ar
d 1449,
T
hi
r
d
Ed
it
ion
, r
e
le
as
ed (2009).
Syst
em
G
rounding and Bonding
The p
erform
an
c
e and
safet
y
o
f a
n
y
S
PD
s
ys
te
m is d
epe
nd
ent
on prop
e
r grounding
and bonding. Grounding is required
f
or s
afety
.
Cor
re
c
t
impl
ementa
tion al
s
o
enh
an
ce
s equipm
en
t p
erform
an
ce
.
In
cor
re
c
t grounding can redu
c
e or impede the
SPD s
op
era
tion.
All
e
le
ctr
ical
c
ir
c
uits
t
o the
S
PD
mu
st in
c
lude an equipm
ent-
gro
unding
c
ondu
ct
or
a
s
required
b
y the N
E
C and local
c
od
e
s.
UN
GR
OUNDED P
O
WER
SY
STEMS ARE
I
NHERENT
L
Y
UNS
T
ABLE
AND
C
AN
PRO
DU
CE
E
XC
ES
SIVE
LY HIGH
LINE-TO- GR
OUND
VOLTA
GE
S
D
UR
I
NG CER
TAI
N
FAUL
T
C
ONDITION
S
.
D
UR
I
NG TH
E
SE
FAUL
T
C
ONDITIONS ANY
EL
EC
TRI
C
AL
EQ
UI
P
MEN
T
,
I
NC
L
UD
I
NG AN S
PD
, M
A
Y BE
SU
BJEC
TED
T
O
VOLTA
GE
S W
HICH E
XCEED THE
I
R
DE
SI
G
NED R
ATI
NG
S
. T
H
IS
INF
ORM
A
TION IS BE
I
NG
PROVI
DED
T
O THE USER SO TH
A
T AN
INF
ORMED
DE
CISION
C
AN
BE
MADE
BE
F
ORE
I
NS
T
ALL
I
NG ANY
EL
EC
TRI
C
AL
EQ
UI
P
MENT ON AN UN
GR
OUNDED
PO
WER
SY
STE
M
.
C
ON
TAC
T
FACTOR
Y
F
OR
UN
GR
OUNDED A
PP
LI
CA
TION
S.
An
insu
la
t
ed
grounding
c
ondu
ct
or
is
required
in
addition
to an
y
met
allic
ra
c
ew
ay,
whi
ch
ma
y
be
us
ed
as a
grounding
c
ondu
ctor
.
F
or
p
arall
el-c
onne
ct
ed
S
PDs, the grounding
c
ondu
ct
or should
be
the
same
wire
size as
the
a
ss
oc
ia
t
ed
p
ow
er
c
ondu
ctor
s.